be silent when file doesn't exist

git-svn: trunk@3939

unit_tests/check_clamscan.sh

@@ -3,7 +3,7 @@ mkdir test-db
 cat <<EOF >test-db/test.hdb
 aa15bcf478d165efd2065190eb473bcb:544:ClamAV-Test-File
 EOF
-rm clamscan.log
+rm -f clamscan.log
 ../clamscan/clamscan --quiet -dtest-db/test.hdb ../test/clam* --log=clamscan.log
 if test $? != 1; then
 	echo "Error running clamscan: $?" >&2;