libobs/util: Use gzopen* instead of gzdopen

Using gzdopen will not work properly if the C standard library used to
get the descriptor is not the same library as the one that was compiled
with zlib.  When this is the case, it causes zlib to fail to write a
file, and would report a C standard library error.  Use gzopen and
gzopen_w instead to ensure that the file is opened and closed by zlib
itself, ensuring that zlib and the libobs do not have to share the C
standard library between each other.

libobs/util/profiler.c

@@ -1043,11 +1043,19 @@ static void dump_csv_gzwrite(void *data, struct dstr *buffer)
 bool profiler_snapshot_dump_csv_gz(const profiler_snapshot_t *snap,
 		const char *filename)
 {
-	FILE *f = os_fopen(filename, "wb");
-	if (!f)
+	gzFile gz;
+#ifdef _WIN32
+	wchar_t *filename_w = NULL;
+
+	os_utf8_to_wcs_ptr(filename, 0, &filename_w);
+	if (!filename_w)
 		return false;
 
-	gzFile gz = gzdopen(fileno(f), "wb");
+	gz = gzopen_w(filename_w, "wb");
+	bfree(filename_w);
+#else
+	gz = gzopen(filename, "wb");
+#endif
 	if (!gz)
 		return false;