fix analyze-clean.sh

analyze-clean.sh

@@ -4,9 +4,9 @@ report_dir=scan-build-$(tr -dc 'a-zA-Z0-9' < /dev/urandom | fold -w 6 | head -n
 
 if make clean ; then
 	scan-build -o "$report_dir" make -j CC=clang
-	if ls "$report_dir" ; then
+	if ls "$report_dir"/* &>/dev/null ; then
 		scan-view "$report_dir"/*
+	fi
 	rm -rf "$report_dir"
 fi
-fi