fix recursive merging, if next recursion level contain schema with unresolved reference

jsonform.gadget.js

@@ -342,6 +342,22 @@
     }
     var key,
       p;
+    if (x.hasOwnProperty("$ref") ||
+        y.hasOwnProperty("$ref")) {
+      if (doesntcopy) {
+        // we need reference resolve before merging
+        // so allOf schema returned and array item or object field
+        // run merging on next iteration.
+        return {
+          allOf: [
+            x,
+            y
+          ]
+        };
+      } else {
+        throw new Error("all reference must be resolved before merge run on first recursion level");
+      }
+    }
     if (x === true) {
       x = {};
     } else if (!doesntcopy) {