Fixed convertHEIC mogrify detection to work as cron task.

bash/convertHEICtoJPG.sh

@@ -12,9 +12,16 @@ keeporiginals=1
 # Set to 0 for PNG (much larger file size)
 saveasjpg=1
 
-# Make sure the mogrify command is available
+# Make sure the mogrify command is available. If this is being
+#  run as a cron job the which command will fail so we check the
+#  default location just in case.
 which mogrify > /dev/null
-[ $? -eq 1 ] && echo "Unable to run the mogrify command. Please follow the build and installation instructions at the top of the script to install the program on your system." && exit
+if [[ $? -eq 1 ]]; then
+ if [[ ! -e "/usr/local/bin/mogrify" ]]; then
+  echo "Unable to run the mogrify command. Please follow the build and installation instructions at the top of the script to install the program on your system."
+  exit
+ fi
+fi
 
 # Change into the folder with our images
 cd "$directory"