MuonHoughPatternTool::printPattern: add check on validity of provided pointer
Athena crashes with a segfault in MuonHoughPatternTool when setting the VERBOSE logging level. This MR fixes the issue. Possibly @jojungge may want to comment.
Athena crashes with a segfault in MuonHoughPatternTool when setting the VERBOSE logging level. This MR fixes the issue. Possibly @jojungge may want to comment.