transmission: gtk client needs locale support in toolchain

Otherwise configure errors out with:

configure: error: "The gtk client cannot be built without nls support.
Try adding either --enable-nls or --disable-gtk"

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

package/transmission/Config.in

@@ -36,10 +36,12 @@ config BR2_PACKAGE_TRANSMISSION_REMOTE
 
 config BR2_PACKAGE_TRANSMISSION_GTK
 	bool "transmission-gtk"
-	depends on BR2_PACKAGE_LIBGTK2
+	depends on BR2_PACKAGE_LIBGTK2 && BR2_ENABLE_LOCALE
 	help
 	  Install transmission GTK-based GUI interface.
 
+comment "transmission-gtk requires a toolchain with locale support"
+	depends on BR2_PACKAGE_LIBGTK2 && !BR2_ENABLE_LOCALE
 endif
 
 comment "Transmission requires a toolchain with IPv6 support"