fix internal grep for function

cm.sh

@@ -396,7 +396,7 @@ _testStaging
 test -z "${CM_diracme}" && CM_diracme=./certs
 test -z "${CM_dircsr}"  && CM_dircsr=./csr
 
-grep "function\ public_$1" $0 >/dev/null 
+grep "function\ public_$1" $( basename $0 ) >/dev/null 
 if [ $# -gt 0 -a $? -eq 0 ]; then
 	# _wd $*
 	action=$1