Close file at the end.

main.c

@@ -276,8 +276,6 @@ int main(int argc, char *argv[])
         fprintf(stderr, "read error: %s\n", strerror(errno));
     }
 
-    fclose(f);
-
     /* return 0; */
 
     U64 lower_bound_s = (U64)ts;
@@ -431,5 +429,7 @@ int main(int argc, char *argv[])
 
     CloseWindow();
 
+    fclose(f);
+
     return 0;
 }