style fix - initializing and assigning empty std::string properly

std::string s(""); s = ""; calls the copy constructor, which in turn calls strlen(), … assigning a default-constructed string generates fewer instructions and is therefore preferred.

With C++11 uniform initialization, you’d simply write s = { } instead.

code/AssetLib/ASE/ASEParser.cpp

@@ -685,7 +685,7 @@ void Parser::ParseLV3MapBlock(Texture &map) {
                     // Files with 'None' as map name are produced by
                     // an Maja to ASE exporter which name I forgot ..
                     ASSIMP_LOG_WARN("ASE: Skipping invalid map entry");
-                    map.mMapName = "";
+                    map.mMapName = std::string();
                 }
 
                 continue;