(decl move)
* declararation rescoping : skip compiler generated code from system headers.
* handle single statement for-loop body, and similar bodies of while, if, etc.
* Relax getLoopIndexVariable(), return NULL instead assert false
* SageInterface::ensureBasicBlockAsFalseBodyOfIf() and changeAllBodiesToBlocks(): add a flag to allow avoiding creation of empty body
Merge branch 'master' of rosecompiler1:rose/edg4x/rose