[gtk-vnc] rpm: skip gtk2-devel if gtk2 is not enabled

[Daniel P. Berrange <dberrange src gnome org>]

commit 1694b228928e50ac79ffdaeba26a0d811e9ebfa0
Author: Daniel P. Berrangé <berrange redhat com>
Date:   Wed Aug 1 17:32:09 2018 +0100

    rpm: skip gtk2-devel if gtk2 is not enabled
    
    Signed-off-by: Daniel P. Berrangé <berrange redhat com>

 gtk-vnc.spec.in | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/gtk-vnc.spec.in b/gtk-vnc.spec.in
index ea2d329..317128e 100644
--- a/gtk-vnc.spec.in
+++ b/gtk-vnc.spec.in
@@ -37,7 +37,9 @@ License: LGPLv2+
 Source: http://ftp.gnome.org/pub/GNOME/sources/%{name}/0.5/%{name}-%{version}.tar.xz
 URL: https://wiki.gnome.org/Projects/gtk-vnc
 Requires: gvnc = %{version}-%{release}
+%if %{with_gtk2}
 BuildRequires: gtk2-devel >= 2.14
+%endif
 BuildRequires: python3
 BuildRequires: gnutls-devel libgcrypt-devel cyrus-sasl-devel zlib-devel intltool
 %if %{with_gir}