added some fault handling for damaged files

DaqFileIO.cxx

@@ -2,7 +2,7 @@
 ///
 // DAQ low level IO Library
 // 
-// $Id: DaqFileIO.cxx,v 1.25 2018/09/12 19:19:02 IOWA\dheitbri Exp $
+// $Id: DaqFileIO.cxx,v 1.26 2019/07/10 17:05:56 IOWA\dheitbri Exp $
 // Date: March, 2005
 // Author: Yiannis Papelis
 //
@@ -1690,6 +1690,7 @@ CDaqLowLevelIo::GetFullData(
 
 	int triesLeft = 32;
 	while ( m_Toc.find(frm1) == m_Toc.end() && triesLeft-- > 0 ) frm1++;
+    if (triesLeft < 0) return false;
 	assert(triesLeft>0);		// shouldn't really happen
 
 	triesLeft = 32;