Make JSX transform not break on 'constructor' attr

Author: sophiebits

vendor/fbtransform/transforms/react.js

@@ -101,7 +101,7 @@ function visitReactTag(traverse, object, path, state) {
       utils.move(attr.name.range[1], state);
       // Use catchupWhiteSpace to skip over the '=' in the attribute
       utils.catchupWhiteSpace(attr.value.range[0], state);
-      if (JSX_ATTRIBUTE_TRANSFORMS[attr.name.name]) {
+      if (JSX_ATTRIBUTE_TRANSFORMS.hasOwnProperty(attr.name.name)) {
         utils.append(JSX_ATTRIBUTE_TRANSFORMS[attr.name.name](attr), state);
         utils.move(attr.value.range[1], state);
         if (!isLast) {