Check if an error is returned when getting public key ID

src/freedombone-base-email

         if [ ${#MY_GPG_PUBLIC_KEY_ID} -lt 4 ]; then
             echo $'GPG public key ID could not be obtained'
         else
-            chown -R $MY_USERNAME:$MY_USERNAME $gpg_dir
-            chmod 700 $gpg_dir
-            chmod 600 $gpg_dir/*
-            mark_completed $FUNCNAME
-            return
+            if [[ "$MY_GPG_PUBLIC_KEY_ID" == *'error'* ]]; then
+                echo $"Can't locate gpg key"
+            else
+                chown -R $MY_USERNAME:$MY_USERNAME $gpg_dir
+                chmod 700 $gpg_dir
+                chmod 600 $gpg_dir/*
+                mark_completed $FUNCNAME
+                return
+            fi
         fi
     fi