Set scanimage default format to PNM

diff --git a/scripts/hv-scan b/scripts/hv-scan
index d1b5628..cca5d58 100755 (executable)
--- a/scripts/hv-scan
+++ b/scripts/hv-scan
@@ -75,6 +75,6 @@ fi
 
 src=${1}
 
-scanimage --mode ${color_mode} --resolution ${resolution} ${scan_area} | \
+scanimage --format=pnm --mode ${color_mode} --resolution ${resolution} ${scan_area} | \
     convert - -compress jpeg -quality ${jpeg_quality} ${resize_pdf} \
     ${src}.${extension}