bunch of warnings fixed

src/core/proteinmatch.cpp

src/files/fastafile.cpp

src/grouping/groupingpeptidemass.cpp

src/input/condorqxmlsaxhandler.cpp

src/input/mascot/mascotdatparser.cpp

src/input/pepxmlsaxhandler.cpp

src/input/xpipsaxhandler.cpp

src/input/xtandemparamsaxhandler.cpp

src/input/xtandemsaxhandler.cpp

src/input/xtpxpipsaxhandler.cpp

src/output/mcqr/mcqrscprotein.cpp

src/output/mcqrspectralcount.cpp

src/output/ods/comparbasesheet.cpp

src/output/ods/comparspectrabypeptide.cpp

src/output/ods/comparspectrasheet.cpp

src/output/ods/ptm/ptmislandsheet.cpp

src/output/ods/spectrasheet.cpp

src/output/ods/spectrasheetall.cpp