scripts: checkpatch: ignore empty file

Signed-off-by: Joseph Chen <chenjh@rock-chips.com>
Change-Id: Ibb388c8416f6b3d6d9391dbdd892e8b976fbcc00

scripts/checkpatch.sh

@@ -37,6 +37,10 @@ pack_trust_image()
 	files=`ls ./RKTRUST/*TOS*.ini`
 	for ini in ${files}
 	do
+		if ! test -s ${ini}; then
+			continue;
+		fi
+
 		if grep  -q '^PATH=img/' ${ini}; then
 			continue;
 		fi