just some cleanup

util.h

@@ -0,0 +1,21 @@
+/*
+  Utility definitions shared by games
+ */
+
+#ifndef GAMES_UTIL_H
+#define GAMES_UTIL_H
+
+/* https://stackoverflow.com/questions/3437404/min-and-max-in-c
+   https://www.reddit.com/r/C_Programming/comments/1aoan41/apparently_inline_is_being_a_dumbo_in_c99_and/
+   I am so confused...
+ */
+
+inline int imax(int a, int b){
+    return a > b ? a : b;
+}
+
+inline int imin(int a, int b){
+    return a < b ? a : b;
+}
+
+#endif