FIX: locally disabling warning C4146: unary minus operator applied to unsigned type, result still unsigned, as it blocks compilation in Visual Studio

Author: Oldes

src/core/n-math.c

@@ -242,6 +242,10 @@ enum {SINE, COSINE, TANGENT};
 	return R_RET;
 }
 
+#if defined(_MSC_VER) && _MSC_VER > 1800
+#pragma warning (disable : 4146)
+#endif
+
 
 /***********************************************************************
 **
@@ -284,6 +288,12 @@ enum {SINE, COSINE, TANGENT};
 	return R_ARG1;
 }
 
+// See above for the temporary disablement and reasoning.
+//
+#if defined(_MSC_VER) && _MSC_VER > 1800
+#pragma warning (default : 4146)
+#endif
+
 
 /***********************************************************************
 **