added check to make sure we are not trying to grab more data than we have space for.

DaqFileIO.cxx

@@ -2,7 +2,7 @@
 ///
 // DAQ low level IO Library
 // 
-// $Id: DaqFileIO.cxx,v 1.15 2010/05/03 17:25:45 iowa\dheitbri Exp $
+// $Id: DaqFileIO.cxx,v 1.16 2011/06/20 14:36:30 iowa\dheitbri Exp $
 // Date: March, 2005
 // Author: Yiannis Papelis
 //
@@ -206,7 +206,7 @@ CDaqLowLevelIo::FrameDropped(int frm)
 }
 
 int  CDaqLowLevelIo::GetDroppedFrames() const {
-	return m_DroppedFrames.size();
+	return (int)m_DroppedFrames.size();
 }
 /////////////////////////////////////////////////////////////////////////////
 ///
@@ -1878,7 +1878,10 @@ CDaqLowLevelIo::ReadDataForOneFrame(
 			}
 
 			int fullSize = ch.GetRecSize();
-			if ( fullSize != size ) {
+			if (size < fullSize){
+				size = fullSize;
+			}
+			if ( fullSize != size && size < fullSize ) {
 				memset(((char *)pTempSpace) + size, 0, fullSize - size);
 			}
 			daqBuf.Replace(pTempSpace, fullSize, ch.GetItemCount());