Memory management hygiene: Use compare() instead of substr(), and put a few more things intrinsically in the memory pool.

git-svn-id: https://cvs.khronos.org/svn/repos/ogl/trunk/ecosystem/public/sdk/tools/glslang@23467 e7fa87d3-cd2b-0410-9028-fcbf551c1848

StandAlone/StandAlone.cpp

@@ -254,7 +254,7 @@ bool SetConfigFile(const std::string& name)
     if (name.size() < 5)
         return false;
 
-    if (name.substr(name.size() - 5, std::string::npos) == ".conf") {
+    if (name.compare(name.size() - 5, 5, ".conf") == 0) {
         ConfigFile = name;
         return true;
     }