Merge pull request #359 from sanjay24/master

json_dump_file API returns success even when fclose fails

src/dump.c

@@ -481,7 +481,9 @@ int json_dump_file(const json_t *json, const char *path, size_t flags)
 
     result = json_dumpf(json, output, flags);
 
-    fclose(output);
+    if(fclose(output) != 0)
+        return -1;
+
     return result;
 }