Build with -DICAL_ALLOW_EMPTY_PROPERTIES=true (#1466906)

libical.spec

@@ -1,7 +1,7 @@
 Summary:	Reference implementation of the iCalendar data type and serialization format
 Name:		libical
 Version:	2.0.0
-Release:	9%{?dist}
+Release:	10%{?dist}
 License:	LGPLv2 or MPLv1.1
 URL:		http://freeassociation.sourceforge.net/
 Source:		https://github.com/%{name}/%{name}/archive/v%{version}/%{name}-%{version}.tar.gz
@@ -41,6 +41,7 @@ mkdir -p %{_target_platform}
 pushd %{_target_platform}
 %{cmake} .. \
   -DUSE_INTEROPERABLE_VTIMEZONES:BOOL=true \
+  -DICAL_ALLOW_EMPTY_PROPERTIES:BOOL=true \
   -DSHARED_ONLY:BOOL=true
 popd
 
@@ -77,6 +78,9 @@ make test ARGS="-V" -C %{_target_platform}
 %{_includedir}/libical/
 
 %changelog
+* Mon Jul 03 2017 Milan Crha <mcrha@redhat.com> - 2.0.0-10
+- Build with -DICAL_ALLOW_EMPTY_PROPERTIES=true (#1466906)
+
 * Fri Feb 10 2017 Fedora Release Engineering <releng@fedoraproject.org> - 2.0.0-9
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_26_Mass_Rebuild