package/lighttpd: pgsql needs wchar

Commit b429dce6f8e2ee162b79fe2a3ebb1bd179f462e3 forgot to add wchar
dependency resulting in the following build failure of postgresql:

configure: error: C compiler "/home/buildroot/autobuild/instance-2/output-1/host/bin/arm-linux-gcc" does not support C99

Fixes:
 - http://autobuild.buildroot.org/results/e4b59fecd2a5bcda8103ddf4eae3dbd78fe3b896

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/lighttpd/Config.in

@@ -83,11 +83,13 @@ config BR2_PACKAGE_LIGHTTPD_PCRE
 config BR2_PACKAGE_LIGHTTPD_PGSQL
 	bool "pgsql support"
 	depends on BR2_USE_MMU # postgresql
+	depends on BR2_USE_WCHAR # postgresql
 	select BR2_PACKAGE_POSTGRESQL
 	help
 	  Enable postgres support for lighttpd mod_vhostdb_pgsql.
 
 comment "pgsql support needs a toolchain w/ wchar"
+	depends on BR2_USE_MMU
 	depends on !BR2_USE_WCHAR
 
 config BR2_PACKAGE_LIGHTTPD_WEBDAV