Fix jv_load_file() (partial fix #799)

jv_file.c

@@ -30,14 +30,18 @@ jv jv_load_file(const char* filename, int raw) {
       jv value;
       while (jv_is_valid((value = jv_parser_next(parser))))
         data = jv_array_append(data, value);
-      jv_free(value);
+      if (jv_invalid_has_msg(jv_copy(value))) {
+        jv_free(data);
+        data = value;
+        value = jv_invalid();
+        break;
+      }
     }
   }
   if (!raw)
       jv_parser_free(parser);
   int badread = ferror(file);
-  fclose(file);
-  if (badread) {
+  if (fclose(file) != 0 || badread) {
     jv_free(data);
     return jv_invalid_with_msg(jv_string_fmt("Error reading from %s",
                                              filename));