Fix getting the image width

gifcap.sh

@@ -26,7 +26,7 @@ usage () {
 	echo "Usage: $name [OPTION]... CAPTION..."
 	echo "Make an iFunny GIF caption."
 	echo ""
-	echo "  -f, --font        specify a font to use (default: ifunny.otf)"
+	echo "  -f, --font        specify a font to use (default: $font)"
 	echo "  -i, --input       the input file (required)"
 	echo "  -o, --output      the output file (default: input)"
 	echo "      --help        display this help and exit"
@@ -80,7 +80,7 @@ fi
 
 captionWidth="512x"
 captionTemp=`mktemp --suffix=".png"`
-imageWidth=`convert "$input" -format "%[w]x" info:`
+imageWidth=`identify -ping -format "%[w]x\n" "$input" | head -n 1`
 
 echo "$name: generating caption..."
 convert \