nagios-check-soa: Fix dnspython dep

Signed-off-by: Stefan Knoblich <stkn@bitplumber.de>

net-analyzer/nagios-check-soa/nagios-check-soa-0.0.0_pre20240528.ebuild

@@ -10,9 +10,11 @@ DESCRIPTION="check_soa.py is a simple program to query the SOA record from a lis
 HOMEPAGE="https://framagit.org/Shaft/check-soa"
 SRC_URI="https://framagit.org/Shaft/check-soa/-/archive/${MY_PV}/check-soa-${MY_PV}.tar.bz2 -> ${P}.tar.bz2"
 
-RDEPEND="${PYTHON_DEPS}
-	dev-python/dnspython"
 DEPEND="${PYTHON_DEPS}"
+RDEPEND="${PYTHON_DEPS}
+	$(python_gen_cond_dep '
+	     dev-python/dnspython[${PYTHON_USEDEP}]
+	')"
 
 KEYWORDS="amd64"
 SLOT="0"