Fixed a buffer overflow.

include/dawn/util/math.h

@@ -13,7 +13,7 @@
  * @param b Number to modulo with. (a % b)
  * @returns The modulo result.
  */
-#define mathMod(a,b)  (a%b+b)%b
+#define mathMod(a,b)  ((a)%(b)+(b))%(b)
 
 /**
  * Returns the modulous a result for b. Works for floating point numbers.

include/dawn/util/rand.h

@@ -42,7 +42,7 @@
  * @param max Maximum value to generate to. (Exclusive)
  * @return Random number between min and max.
  */
-#define randRange(n, min, max) (mathMod(n, max - min) + min)
+#define randRange(n, min, max) (mathMod(n, (max-min)) + min)
 
 #define randInt32Range(min, max) randRange(randInt32(), min, max)
 #define randFloatRange(min, max) (fmod(randFloat(), max- min) + min)