Bug 1254963 - Fix build error C2664 on MSVC 2015. r=aklotz

toolkit/crashreporter/nsExceptionHandler.cpp

@@ -1133,6 +1133,14 @@ BuildTempPath(wchar_t* aBuf, size_t aBufLen)
   return GetTempPath(pathLen, aBuf);
 }
 
+#ifdef MOZ_CHAR16_IS_NOT_WCHAR
+static size_t
+BuildTempPath(char16_t* aBuf, size_t aBufLen)
+{
+  return BuildTempPath(reinterpret_cast<wchar_t*>(aBuf), aBufLen);
+}
+#endif
+
 #elif defined(XP_MACOSX)
 
 static size_t