get working with GNU bc

pdfresize/pdfresize.sh

@@ -20,8 +20,8 @@ input_w=`echo $size | sed -e 's;x.*$;;'`
 input_h=`echo $size | sed -e 's;^.*x;;'`
 
 #   calculate new size
-output_w=`(echo "scale = 0"; echo "$input_w * $scale" ) | @l_prefix@/bin/bc - | sed -e 's;\..*;;'`
-output_h=`(echo "scale = 0"; echo "$input_h * $scale" ) | @l_prefix@/bin/bc - | sed -e 's;\..*;;'`
+output_w=`(echo "scale = 0"; echo "$input_w * $scale" ) | @l_prefix@/bin/bc | sed -e 's;\..*;;'`
+output_h=`(echo "scale = 0"; echo "$input_h * $scale" ) | @l_prefix@/bin/bc | sed -e 's;\..*;;'`
 
 #   perform resizing with the help of Ghostscript
 @l_prefix@/bin/gs \