Return client resources even if no data pack found on server. Closes #6225 (Pull request)

Signed-off-by: cpw <cpw+github@weeksfamily.ca>

src/main/java/net/minecraftforge/fml/packs/ModFileResourcePack.java

@@ -117,7 +117,14 @@ public class ModFileResourcePack extends ResourcePack
         }
         catch (IOException e)
         {
-            return Collections.emptySet();
+            if (type == ResourcePackType.SERVER_DATA) //We still have to add the resource namespace if client resources exist, as we load langs (which are in assets) on server
+            {
+                return this.getResourceNamespaces(ResourcePackType.CLIENT_RESOURCES);
+            }
+            else
+            {
+                return Collections.emptySet();
+            }
         }
     }