patch 9.1.0308: configure: msgfmt hardcoded

Problem:  configure: msgfmt hardcoded (after v9.1.0173)
Solution: use $MSGFMT instead of msgfmt in configure script,
          regenerate the configure script
          (Vladimír Marek)

fixes: #14515

Signed-off-by: Vladimír Marek <vlmarek13@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/auto/configure b/src/auto/configure
index 9712104..0e0cf8e 100755
--- a/src/auto/configure
+++ b/src/auto/configure
@@ -15965,16 +15965,16 @@
 printf "%s\n" "no" >&6; }
       fi
 
-      { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if msgfmt supports --no-convert" >&5
-printf %s "checking if msgfmt supports --no-convert... " >&6; }
+      { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if $MSGFMT supports --no-convert" >&5
+printf %s "checking if $MSGFMT supports --no-convert... " >&6; }
       if "$MSGFMT" --help | grep -q --  '--no-convert' >/dev/null; then
         { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 printf "%s\n" "yes" >&6; }
-        MSGFMTCMD="OLD_PO_FILE_INPUT=yes msgfmt --no-convert -v"
+        MSGFMTCMD="OLD_PO_FILE_INPUT=yes $MSGFMT --no-convert -v"
       else
         { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
-        MSGFMTCMD="OLD_PO_FILE_INPUT=yes msgfmt -v"
+        MSGFMTCMD="OLD_PO_FILE_INPUT=yes $MSGFMT -v"
       fi
 
     fi