fixed the assertion failure that arose when a built-in global variable is set with -v.

changed multiple open functions to accept hawk_errinfo_t* instead of hawk_errnum_t*

configure

@@ -1,6 +1,6 @@
 #! /bin/sh
 # Guess values for system-dependent variables and create Makefiles.
-# Generated by GNU Autoconf 2.72 for hawk 0.9.9.
+# Generated by GNU Autoconf 2.72 for hawk 0.9.10.
 #
 # Report bugs to <Chung, Hyung-Hwan (hyunghwan.chung@gmail.com)>.
 #
@@ -614,8 +614,8 @@ MAKEFLAGS=
 # Identity of this package.
 PACKAGE_NAME='hawk'
 PACKAGE_TARNAME='hawk'
-PACKAGE_VERSION='0.9.9'
-PACKAGE_STRING='hawk 0.9.9'
+PACKAGE_VERSION='0.9.10'
+PACKAGE_STRING='hawk 0.9.10'
 PACKAGE_BUGREPORT='Chung, Hyung-Hwan (hyunghwan.chung@gmail.com)'
 PACKAGE_URL='https://code.miflux.net/hyung-hwan/hawk'
 
@@ -1443,7 +1443,7 @@ if test "$ac_init_help" = "long"; then
   # Omit some internal or obsolete options to make the list less imposing.
   # This message is too long to be a string in the A/UX 3.1 sh.
   cat <<_ACEOF
-'configure' configures hawk 0.9.9 to adapt to many kinds of systems.
+'configure' configures hawk 0.9.10 to adapt to many kinds of systems.
 
 Usage: $0 [OPTION]... [VAR=VALUE]...
 
@@ -1514,7 +1514,7 @@ fi
 
 if test -n "$ac_init_help"; then
   case $ac_init_help in
-     short | recursive ) echo "Configuration of hawk 0.9.9:";;
+     short | recursive ) echo "Configuration of hawk 0.9.10:";;
    esac
   cat <<\_ACEOF
 
@@ -1658,7 +1658,7 @@ fi
 test -n "$ac_init_help" && exit $ac_status
 if $ac_init_version; then
   cat <<\_ACEOF
-hawk configure 0.9.9
+hawk configure 0.9.10
 generated by GNU Autoconf 2.72
 
 Copyright (C) 2023 Free Software Foundation, Inc.
@@ -2409,7 +2409,7 @@ cat >config.log <<_ACEOF
 This file contains any messages produced by compilers while
 running configure, to aid debugging if configure makes a mistake.
 
-It was created by hawk $as_me 0.9.9, which was
+It was created by hawk $as_me 0.9.10, which was
 generated by GNU Autoconf 2.72.  Invocation command line was
 
   $ $0$ac_configure_args_raw
@@ -4111,7 +4111,7 @@ fi
 
 # Define the identity of the package.
  PACKAGE='hawk'
- VERSION='0.9.9'
+ VERSION='0.9.10'
 
 
 printf "%s\n" "#define PACKAGE \"$PACKAGE\"" >>confdefs.h
@@ -29613,7 +29613,7 @@ cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
 # report actual input values of CONFIG_FILES etc. instead of their
 # values after options handling.
 ac_log="
-This file was extended by hawk $as_me 0.9.9, which was
+This file was extended by hawk $as_me 0.9.10, which was
 generated by GNU Autoconf 2.72.  Invocation command line was
 
   CONFIG_FILES    = $CONFIG_FILES
@@ -29682,7 +29682,7 @@ ac_cs_config_escaped=`printf "%s\n" "$ac_cs_config" | sed "s/^ //; s/'/'\\\\\\\\
 cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
 ac_cs_config='$ac_cs_config_escaped'
 ac_cs_version="\\
-hawk config.status 0.9.9
+hawk config.status 0.9.10
 configured by $0, generated by GNU Autoconf 2.72,
   with options \\"\$ac_cs_config\\"