configure: Fix --disable-pcre2

Previously it would result in neither pcre library being detected:

    checking for getnameinfo... (cached) yes
    configure: WARNING: Ignoring pcre2 even if it's available
    test: =: unexpected operator
    Enabling support for client-specific tags.
    checking for zlibVersion in -lz... (cached) yes
    Enabling compression support.
    test: =: unexpected operator
    test: =: unexpected operator
    configure: error: Detected neither pcre2 nor pcre library.

diff --git a/configure.in b/configure.in
index 0181d25..f8a23a5 100644 (file)
--- a/configure.in
+++ b/configure.in
@@ -872,6 +872,7 @@ if test $enableval2 = yes; then
 else
   AC_MSG_WARN([Ignoring pcre2 even if it's available])
   try_pcre2=no
+  have_pcre2=no
 fi
 
 if test $try_pcre2 != no; then