Fix MacVim configure scripts to parse Vim version without 0 patches

Vim 9.1 just landed with 0 patches (i.e. 9.1.0) and existing configure
scripts weren't set up to deal with this.

Author: ychin

src/auto/configure

@@ -10700,9 +10700,12 @@ system ("touch conf.gtktest");
 tmp_version = g_strdup("$min_gtk_version");
 if (sscanf(tmp_version, "%d.%d.%d", &major, &minor, &micro) != 3) {
    printf("%s, bad version string\n", "$min_gtk_version");
+   g_free(tmp_version);
    exit(1);
  }
 
+g_free(tmp_version);
+
 if ((gtk_major_version > major) ||
     ((gtk_major_version == major) && (gtk_minor_version > minor)) ||
     ((gtk_major_version == major) && (gtk_minor_version == minor) &&
@@ -16560,7 +16563,7 @@ fi
 
     vim_major_version_string=`/usr/bin/grep -m 1 'define.*VIM_VERSION_MAJOR' $srcdir/version.h|sed -E -e 's/^.*([0-9]+).*/\1/'`
   vim_minor_version_string=`/usr/bin/grep -m 1 'define.*VIM_VERSION_MINOR' $srcdir/version.h|sed -E -e 's/^.*([0-9]+).*/\1/'`
-  snapshot=`/usr/bin/grep -C2 "Add new patch number below this line" $srcdir/version.c|tail -1|sed -E -e 's/^ *([0-9]+),.*/\1/'`
+  snapshot=`/usr/bin/grep -C2 "Add new patch number below this line" $srcdir/version.c|tail -1|sed -E -e 's/^ *([0-9]+).*/\1/'`
   vim_short_version_string="$vim_major_version_string.$vim_minor_version_string.$snapshot"
 
   if echo "$vim_short_version_string" | /usr/bin/grep -q "^[[:digit:]]\+\.[[:digit:]]\+\.[[:digit:]]\+$"; then

src/configure.ac

@@ -4894,7 +4894,7 @@ if test "x$MACOS_X" = "xyes"; then
   dnl Set CFBundleShortVersionString of Info.plist
   vim_major_version_string=`/usr/bin/grep -m 1 'define.*VIM_VERSION_MAJOR' $srcdir/version.h|sed -E -e 's/^.*([[0-9]]+).*/\1/'`
   vim_minor_version_string=`/usr/bin/grep -m 1 'define.*VIM_VERSION_MINOR' $srcdir/version.h|sed -E -e 's/^.*([[0-9]]+).*/\1/'`
-  snapshot=`/usr/bin/grep -C2 "Add new patch number below this line" $srcdir/version.c|tail -1|sed -E -e 's/^ *([[0-9]]+),.*/\1/'`
+  snapshot=`/usr/bin/grep -C2 "Add new patch number below this line" $srcdir/version.c|tail -1|sed -E -e 's/^ *([[0-9]]+).*/\1/'`
   vim_short_version_string="$vim_major_version_string.$vim_minor_version_string.$snapshot"
 
   if echo "$vim_short_version_string" | /usr/bin/grep -q "^[[[:digit:]]]\+\.[[[:digit:]]]\+\.[[[:digit:]]]\+$"; then