[gnome-terminal] build: Disable pcre2 for 3.20

[Christian Persch <chpe src gnome org>]

commit cd4128a2d7ece9c15c134d7a1a7a773dc1d2d53e
Author: Christian Persch <chpe gnome org>
Date:   Sat Feb 20 13:52:11 2016 +0100

    build: Disable pcre2 for 3.20
    
    vte 0.44 for 3.20 doesn't export the necessary API.

 configure.ac |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 0a88426..62aa8b0 100644
--- a/configure.ac
+++ b/configure.ac
@@ -81,12 +81,13 @@ done
 AC_MSG_CHECKING([whether PCRE2 support is requested])
 AC_ARG_WITH([pcre2],
   [AS_HELP_STRING([--without-pcre2],[Disable pcre2 support])],
-  [],[with_pcre2=yes])
+  [],[with_pcre2=no])
 AC_MSG_RESULT([$with_pcre2])
 
 PCRE2_PKGS=
 if test "$with_pcre2" = "yes"; then
   PCRE2_PKGS="libpcre2-8 >= $PCRE2_REQUIRED"
+  VTE_REQUIRED=0.45.0
 
   PKG_CHECK_MODULES([PCRE2],[$PCRE2_PKGS],,
     [AC_MSG_ERROR([PCRE2 requested but libpcre2-8 not found. Use --without-pcre2 to disable PCRE2])])