patch 9.1.0691: python3: stable-abi may cause segfault on Python 3.11

Problem:  python3: stable-abi may cause segfault on Python 3.11
          (Audrius Kažukauskas, after v9.1.0668)
Solution: do not enable the stable Python ABI by default, only when used
          with --with-python3-stable-abi argument is given

related: #15543

Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/configure.ac b/src/configure.ac
index 43832dc..abd0c44 100644
--- a/src/configure.ac
+++ b/src/configure.ac
@@ -1544,16 +1544,13 @@
       AC_SUBST(vi_cv_var_python3_stable_abi)
       AC_ARG_WITH(python3-stable-abi, [  --with-python3-stable-abi=VERSION  stable ABI version to target (default: 3.8)],
         [
-	 if test "X$withval" = "Xyes"; then
-	   vi_cv_var_python3_stable_abi=$python3_stable_abi_default
-	 else
-	   vi_cv_var_python3_stable_abi="$withval"
-	 fi
-	 AC_MSG_RESULT($vi_cv_var_python3_stable_abi)],
-        [
-	 vi_cv_var_python3_stable_abi=$python3_stable_abi_default
-	 AC_MSG_RESULT(no. defaults to $python3_stable_abi_default.)])
-      if test "X$vi_cv_var_python3_stable_abi" != "Xno"; then
+     if test "X$withval" = "Xyes"; then
+       vi_cv_var_python3_stable_abi=$python3_stable_abi_default
+     else
+       vi_cv_var_python3_stable_abi="$withval"
+     fi
+     AC_MSG_RESULT($vi_cv_var_python3_stable_abi)])
+      if test "X$vi_cv_var_python3_stable_abi" != "X"; then
         AC_CACHE_VAL(vi_cv_var_python3_stable_abi_hex,
         [
          vi_cv_var_python3_stable_abi_hex=`