sys-cluster/sionlib: fix doc building

Package-Manager: Portage-3.0.18, Repoman-3.0.3
Signed-off-by: Alessandro Barbieri <lssndrbarbieri@gmail.com>

sys-cluster/sionlib/sionlib-1.7.6.ebuild

@@ -83,8 +83,10 @@ src_configure() {
 src_compile() {
 	export VARTEXFONTS="${T}/fonts"
 	default
-	use doc && doxygen -u doxy || die
-	use doc && doxygen doxy || die
+	if use doc ; then
+		doxygen -u doxy || die
+		doxygen doxy || die
+	fi
 }
 
 src_install() {