allow to use MEM_DEBUG with libtcc

libtcc.c

@@ -1111,6 +1111,7 @@ LIBTCCAPI void tcc_delete(TCCState *s1)
 
     tcc_free(s1->sym_attrs);
     tcc_free(s1);
+    tcc_memstats();
 }
 
 LIBTCCAPI int tcc_add_include_path(TCCState *s, const char *pathname)

tcc.c

@@ -369,7 +369,5 @@ int main(int argc, char **argv)
     }
 
     tcc_delete(s);
-    if (bench)
-        tcc_memstats();
     return ret;
 }