- 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/FindInvalidDataProcess.cpp

@@ -58,6 +58,7 @@ using namespace Assimp;
 // ------------------------------------------------------------------------------------------------
 // Constructor to be privately used by Importer
 FindInvalidDataProcess::FindInvalidDataProcess()
+    : configEpsilon(0.0f)
 {
 	// nothing to do here
 }