Minor efficiency fix

components/esmterrain/storage.cpp

@@ -465,8 +465,9 @@ namespace ESMTerrain
     Terrain::LayerInfo Storage::getLayerInfo(const std::string& texture)
     {
         // Already have this cached?
-        if (mLayerInfoMap.find(texture) != mLayerInfoMap.end())
-            return mLayerInfoMap[texture];
+        std::map<std::string, Terrain::LayerInfo>::iterator found = mLayerInfoMap.find(texture);
+        if (found != mLayerInfoMap.end())
+            return found->second;
 
         Terrain::LayerInfo info;
         info.mParallax = false;