add some more missing C99 math.h functions

src/mathc99.cc

@@ -1,5 +1,18 @@
 #include "mathc99.h"
 
-double found(double a) {
-    return a > 0 ? floor(a+0.5) : ceil(a-0.5);
+#ifdef WIN32
+#include <algorithm>
+
+double round(double a) {
+	return a > 0 ? floor(a+0.5) : ceil(a-0.5);
 }
+
+float fmin(float a, float b) {
+	return std::min(a,b);
+}
+
+float fmax(float a, float b) {
+	return std::max(a,b);
+}
+
+#endif

src/mathc99.h

@@ -6,6 +6,8 @@
 #include <cmath>
 //for native win32 builds we need to provide C99 math functions by ourselves
 double round(double a);
+float fmin(float a, float b);
+float fmax(float a, float b);
 
 #else