Add a default for %samba_package_version

Signed-off-by: Nikola Forró <nforro@redhat.com>
Reviewed-by: Tomáš Halman <thalman@redhat.com>
(cherry picked from commit caa0ec2)

Author: nforro

contrib/sssd.spec.in

@@ -52,6 +52,10 @@
 
 %global samba_package_version %(rpm -q samba-devel --queryformat %{version})
 
+%if "%{?samba_package_version}" == ""
+%global samba_package_version 4.19
+%endif
+
 Name: @PACKAGE_NAME@
 Version: %{gsub @PACKAGE_VERSION@ - ~}
 Release: 0@PRERELEASE_VERSION@%{?dist}