- add missing initialization of several class members

- prefer check for empty() over check for size() in OptimizeGraph (empty() is guaranteed to be constant time, size() is not)
- fix a couple of incorrect indentations

code/OptimizeMeshes.cpp

@@ -60,9 +60,11 @@ static const unsigned int DeadBeef = 0xdeadbeef;
 // ------------------------------------------------------------------------------------------------
 // Constructor to be privately used by Importer
 OptimizeMeshesProcess::OptimizeMeshesProcess()
-: pts (false)
-, max_verts( NotSet )
-, max_faces( NotSet ) {
+    : mScene()
+    , mesh()
+    , pts(false)
+    , max_verts( NotSet )
+    , max_faces( NotSet ) {
     // empty
 }