safer _with_kde4 macro conditionals

kde-connect.spec

@@ -48,7 +48,7 @@ BuildRequires:  qt5-qtbase-devel
 BuildRequires:  qt5-qtdeclarative-devel
 BUildRequires:  qt5-qtx11extras-devel
 
-%if %{_with_kde4}
+%if 0%{?_with_kde4}
 BuildRequires:  kdelibs4-devel
 BuildRequires:  pkgconfig(dbus-1)
 BuildRequires:  pkgconfig(libfakekey)
@@ -140,7 +140,7 @@ install -m644 -p -D %{SOURCE2} %{buildroot}%{_prefix}/lib/firewalld/services/kde
 
 %find_lang %{name} --all-name
 
-%if %{_with_kde4}
+%if 0%{?_with_kde4}
 make install/fast DESTDIR=%{buildroot} -C %{_builddir}/kde4/kdeconnect-kde-0.8/%{_target_platform}/interfaces
 make install/fast DESTDIR=%{buildroot} -C %{_builddir}/kde4/kdeconnect-kde-0.8/%{_target_platform}/kio