add missing free

tests/test47.c

@@ -22,7 +22,7 @@ int main() {
     printf("%s\n", utstring_body(t));
     printf("length t now: %u\n", utstring_len(t));
 
-
+    utstring_free(t);
     utstring_free(s);
     return 0;
 }

tests/test62.c

@@ -57,5 +57,6 @@ int main(int argc,char*argv[]) {
   rc = MUR_GETBLOCK(u3,0); printf("%x\n", rc);
 #endif
 
+  free(c);
   return 0;
 }