sddm: don't check for virtualization if start-sway is sourced

sddm/sddm-compositor-sway

@@ -3,16 +3,18 @@
 # Add sddm config file to the arguments 
 set -- --config /etc/sway/sddm-greeter.config "$@"
 
-## Set some compatibility variables in case if sway-config-fedora is not present
-if systemd-detect-virt --quiet --vm; then
-    export WLR_NO_HARDWARE_CURSORS=1
-    export WLR_RENDERER=pixman
-fi
-
 # Try to use a wrapper script from sway-config-fedora
 if [ -x /usr/bin/start-sway ]; then
     # shellcheck source=../sway/start-sway
     . /usr/bin/start-sway
-else
-    exec sway "$@"
+    # unreachable
+    exit 1
 fi
+
+# Set some compatibility variables in case if sway-config-fedora is not present
+if systemd-detect-virt --quiet --vm; then
+    export WLR_NO_HARDWARE_CURSORS=1
+    export WLR_RENDERER=pixman
+fi
+
+exec /usr/bin/sway "$@"