Fix faulty null checks

package.json

@@ -1,6 +1,6 @@
 {
   "name": "metamask-mobile-provider",
-  "version": "1.0.1",
+  "version": "1.0.2",
   "main": "dist/index.js",
   "scripts": {
     "test": "echo \"Error: no test specified\" && exit 1",

src/inpage/MobilePortStream.js

@@ -38,18 +38,15 @@ MobilePortStream.prototype._onMessage = function (event) {
   if (this._origin !== '*' && event.origin !== this._origin) {
     return
   }
-  if (typeof msg !== 'object') {
+  if (!msg || typeof msg !== 'object') {
     return
   }
-  if (typeof msg.data !== 'object') {
+  if (!msg.data || typeof msg.data !== 'object') {
     return
   }
   if (msg.target && msg.target !== this._name) {
     return
   }
-  if (!msg.data) {
-    return
-  }
   // Filter outgoing messages
   if (msg.data.data && msg.data.data.toNative) {
     return

src/inpage/ReactNativePostMessageStream.js

@@ -36,7 +36,7 @@ PostMessageStream.prototype._onMessage = function (event) {
   if (event.source !== this._targetWindow && window === top) {
     return
   }
-  if (typeof msg !== 'object') {
+  if (!msg || typeof msg !== 'object') {
     return
   }
   if (msg.target !== this._name) {