fixed a fast_atof bug with negative exponents

git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@702 dfc29bdd-3216-0410-991c-e03cc46cb475

changes.txt

@@ -1,5 +1,7 @@
 Changes in version 1.3.1 (?? Mar 2007)
 
+ - Fixed a bug with negative exponents in fast_atof, posted by RVL
+
  - renamed IAnimatedMeshSceneNode::getAbsoluteTransformation to getMD3TagTransformation
    to avoid conflicts with ISceneNode::getAbsoluteTransformation
 

include/fast_atof.h

@@ -86,8 +86,14 @@ inline const char* fast_atof_move( const char* c, float& out)
 		{
 			++c;
 			//float exp = (float)strtol(c, &t, 10);
+			bool einv = (*c=='-');
+			if (einv)
+				c++;
+
 			float exp = (float)strtol10(c, t);
-			
+			if (einv)
+				exp *= -1.0f;
+
 			f *= (float)pow(10.0f, exp);
 			c = t;
 		}