aping.sh: fix espeak voice option and empty sound file argument

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

aping.sh

@@ -9,7 +9,7 @@ site="google.com"
 
 #notification settings
 sound_player="espeak"
-player_opts=("-v en-uk-north")
+player_opts=("-v" "en-gb-x-gbclan")
 sound_file=""
 sound_message="The internet is working!"
 popup_box="false"
@@ -41,7 +41,7 @@ withLoop(){
 
     elif [ $ping_result = "0" ];then
       if [ "${play_sound}" = "true" ];then
-        ${sound_player} "${player_opts[@]}" ${sound_file} "${sound_message}" &
+        ${sound_player} "${player_opts[@]}" ${sound_file:+"${sound_file}"} "${sound_message}" &
       fi
 
       lanip=$(ip -o -4 addr show | awk '$2 != "lo" {sub(/\/.*/, "", $4); print $4}')
@@ -89,7 +89,7 @@ withoutLoop(){
     elif [ $ping_result = "0" ];then
 
       if [ "${play_sound}" = "true" ];then
-        ${sound_player} "${player_opts[@]}" "${sound_file}" "${sound_message}" &
+        ${sound_player} "${player_opts[@]}" ${sound_file:+"${sound_file}"} "${sound_message}" &
       fi