Removed unused K parameters from macros that are not associative containers

examples/heapsort.c

@@ -6,7 +6,7 @@ static int intcmp(int a, int b)
     return a - b;
 }
 
-HEAP_GENERATE(h, heap, static, , int)
+HEAP_GENERATE(h, heap, static, int)
 
 int main(int argc, char const *argv[])
 {