Bug 1316168: Fix the clang-cl build in nsExceptionHandler.cpp. r=froydnj

MozReview-Commit-ID: HdUp3dGRmcq

--HG--
extra : rebase_source : 1bbfb18bffd3f19469984ffe32324a7250c0ac09

toolkit/crashreporter/nsExceptionHandler.cpp

@@ -523,7 +523,7 @@ CreatePathFromFile(nsIFile* file)
   if (NS_FAILED(rv)) {
     return nullptr;
   }
-  return new xpstring(path.get(), path.Length());
+  return new xpstring(static_cast<wchar_t*>(path.get()), path.Length());
 }
 #else
 static void