Cleaned warnings

src/main.c

@@ -56,5 +56,12 @@ int main(int argc, char **argv)
     printf("globalDrawingSpace: %p, size: %lu\n", globalDrawingSpace, globalDrawingSpace->size);
     printf("arrowList: %p, size: %lu\n", arrowList, arrowList->size);
 
+    free(globalDrawingSpace->space);
+    free(globalDrawingSpace);
+    free(globalPreemptionSpace->space);
+    free(globalPreemptionSpace);
+    free(arrowList->space);
+    free(arrowList);
+
     return 0;
 }