Fix various compiler warnings on MSVC

I tried to avoid casts whereever it was possible, but for some cases it wasn't.

BlockPos.h

@@ -142,8 +142,8 @@ public:
 	NodeCoordHashed(const BlockPos &pos) : NodeCoord(pos) { rehash(); }
 	NodeCoordHashed(const NodeCoord &coord) : NodeCoord(coord) { rehash(); }
 	void rehash(void) { m_hash = NodeCoord::hash(); }
-	unsigned hash(void) { rehash(); return m_hash; }
-	unsigned hash(void) const { return m_hash; }
+	size_t hash(void) { rehash(); return m_hash; }
+	size_t hash(void) const { return m_hash; }
 	bool operator==(const NodeCoordHashed &coord) const { if (m_hash != coord.m_hash) return false; return NodeCoord::operator==(coord); }
 	void operator=(const NodeCoord &coord) { NodeCoord::operator=(coord); rehash(); }
 	bool operator<(const NodeCoordHashed &coord) { return m_hash < coord.m_hash; }

TileGenerator.cpp

@@ -2214,8 +2214,8 @@ void TileGenerator::renderHeightScale()
 		Color color = computeMapHeightColor(int(height + 0.5));
 		gdImageLine(m_image, xBorderOffset + x, yBorderOffset + 8, xBorderOffset + x, yBorderOffset + borderBottom() - 20, color.to_libgd());
 
-		int iheight = int(height + (height > 0 ? 0.5 : -0.5));
-		int iheightMaj = int(iheight / major + (height > 0 ? 0.5 : -0.5)) * major;
+		int iheight = static_cast<int>(height + (height > 0 ? 0.5 : -0.5));
+		int iheightMaj = static_cast<int>(trunc(iheight / major + (height > 0 ? 0.5 : -0.5)) * major);
 		if (fabs(height - iheightMaj) <= height_step / 2 && (height - iheightMaj) > -height_step / 2) {
 			if (iheightMaj / int(major) % 2 == 1 && fabs(height) > 9999 && major / height_step < 56) {
 				// Maybe not enough room for the number. Draw a tick mark instead
@@ -2252,8 +2252,8 @@ void TileGenerator::renderPlayers(const std::string &inputPath)
 
 	PlayerAttributes players(inputPath);
 	for (PlayerAttributes::Players::iterator player = players.begin(); player != players.end(); ++player) {
-		int imageX = worldX2ImageX(player->x / 10);
-		int imageY = worldZ2ImageY(player->z / 10);
+		int imageX = worldX2ImageX(static_cast<int>(player->x / 10));
+		int imageY = worldZ2ImageY(static_cast<int>(player->z / 10));
 		std::string displayName = m_gdStringConv->convert(player->name);
 
 		gdImageArc(m_image, imageX, imageY, 5, 5, 0, 360, color);

ZlibDecompressor.cpp

@@ -46,7 +46,7 @@ ustring ZlibDecompressor::decompress()
 	strm.zfree = Z_NULL;
 	strm.opaque = Z_NULL;
 	strm.next_in = Z_NULL;
-	strm.avail_in = size;
+	strm.avail_in = static_cast<uInt>(size);
 
 	if (inflateInit(&strm) != Z_OK) {
 		throw DecompressError(strm.msg);

mapper.cpp

@@ -49,6 +49,7 @@ using namespace std;
 #define DRAW_ARROW_LENGTH		10
 #define DRAW_ARROW_ANGLE		30
 
+
 // Will be replaced with the actual name and location of the executable (if found)
 string executableName = "minetestmapper";
 string executablePath;			// ONLY for use on windows
@@ -497,7 +498,7 @@ static void orderCoordinateDimensions(NodeCoord &coord1, NodeCoord &coord2, int
 // <x>,<y>@<angle>+<length>
 static bool parseGeometry(istream &is, NodeCoord &coord1, NodeCoord &coord2, NodeCoord &dimensions, bool &legacy, bool &centered, int n, FuzzyBool expectDimensions, int wildcard = 0)
 {
-	int pos;
+	std::streamoff pos;
 	pos = is.tellg();
 	legacy = false;
 
@@ -871,7 +872,7 @@ int main(int argc, char *argv[])
 					break;
 				case OPT_HEIGHTMAPYSCALE:
 					if (isdigit(optarg[0]) || ((optarg[0]=='-' || optarg[0]=='+') && isdigit(optarg[1]))) {
-						float scale = atof(optarg);
+						float scale = static_cast<float>(atof(optarg));
 						generator.setHeightMapYScale(scale);
 					}
 					else {

minetest-database.h

@@ -34,15 +34,15 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 static inline int unsigned_to_signed(unsigned i, unsigned max_positive)
 {
 	if (i < max_positive) {
-		return i;
+		return static_cast<int>(i);
 	} else {
-		return i - (max_positive * 2);
+		return static_cast<int>(i - (max_positive * 2));
 	}
 }
 
 
 // Modulo of a negative number does not work consistently in C
-static inline int64_t pythonmodulo(int64_t i, int16_t mod)
+static inline unsigned pythonmodulo(int64_t i, unsigned mod)
 {
 	if (i >= 0) {
 		return i % mod;

util.h

@@ -6,9 +6,9 @@
 
 inline std::string strlower(const std::string &s)
 {
-	int l = s.length();
+	size_t l = s.length();
 	std::string sl = s;
-	for (int i = 0; i < l; i++)
+	for (size_t i = 0; i < l; i++)
 		sl[i] = tolower(sl[i]);
 	return sl;
 }