Includes stdio.h instead of printf.h

rmutil/test_priority_queue.c

@@ -1,4 +1,4 @@
-#include <printf.h>
+#include <stdio.h>
 #include "assert.h"
 #include "priority_queue.h"
 
@@ -34,4 +34,4 @@ int main(int argc, char **argv) {
     Priority_Queue_Free(pq);
     printf("PASS!");
     return 0;
-}
+}