Wave front bug-fix and comment-fix
This is about #528 (Bug in wave front processing),
To enable WPP (--WaveFrontSynchro=1), in EncSlice.cpp
bool isLastCTUinWPP = wavefrontsEnabled && ((ctuRsAddr + 1 % widthInCtus) == tileXPosInCtus);
should be replaced with
bool isLastCTUinWPP = wavefrontsEnabled && (((ctuRsAddr + 1) % widthInCtus) == tileXPosInCtus);
Some wrong software comments on WPP are also fixed.
Note: combination usage of WPP and tile needs more changes.