Merge commit '7432e872'

* commit '7432e872':
  configure: Add print_3_columns helper function and use where appropriate
Merged-by: Michael Niedermayer <michaelni@gmx.at>

configure

@@ -2229,10 +2229,14 @@ die_unknown(){
     exit 1
 }
 
+print_3_columns() {
+    cat | tr ' ' '\n' | sort | pr -r -3 -t
+}
+
 show_list() {
     suffix=_$1
     shift
-    echo $* | sed s/$suffix//g | tr ' ' '\n' | sort | pr -3 -t
+    echo $* | sed s/$suffix//g | print_3_columns
     exit 0
 }
 
@@ -4327,7 +4331,7 @@ echo
 for type in decoder encoder hwaccel parser demuxer muxer protocol filter bsf indev outdev; do
     echo "Enabled ${type}s:"
     eval list=\$$(toupper $type)_LIST
-    print_enabled '_*' $list | sort | pr -r -3 -t
+    print_enabled '_*' $list | print_3_columns
     echo
 done