M include/mgba-util/math.h → include/mgba-util/math.h

@@ -18,6 +18,9 @@ }
 
 static inline unsigned clz32(uint32_t bits) {
 #if defined(__GNUC__) || __clang__
+	if (!bits) {
+		return 32;
+	}
 	return __builtin_clz(bits);
 #else
 	static const int table[256] = {