Rework message building in muc disco query per clang error.
Rework message building in muc disco query per clang error.

Report URL: /clang-analyzer/xmp3/2012-01-04-1/report-MUmoZl.html#EndPath

BellerophonMobile/xmp3,BellerophonMobile/xmp3,BellerophonMobile/xmp3