use test properly

bin/gsr

@@ -6,14 +6,13 @@ AUDIONOMIC="-ac opus -a default_output"
 VIDEO="-w DP-3 -k av1_10bit -c mkv -fm content -bm vbr"
 OUTPUT="-o $HOME/wdraidz/media/game-videos/$(date +%m-%d-%Y_%R:%S).mkv"
 
-if [ $GSRPID != 0 ]; then
+if [ -n "$GSRPID" ]; then
   kill -2 $GSRPID
   kill -36 $DWMBLOCKSPID
   notify-send "recording saved" -i :
   exit
 fi
 
-
 if [ $1 = 1 ]; then 
   gpu-screen-recorder $VIDEO $AUDIONOMIC $OUTPUT&
   kill -36 $DWMBLOCKSPID