Fix cross-build of ncurses by tool-depending on itself for tic.

Index: devel/ncurses/Makefile.common
===================================================================
RCS file: /cvsroot/pkgsrc/devel/ncurses/Makefile.common,v
retrieving revision 1.18
diff -p -u -r1.18 Makefile.common
--- devel/ncurses/Makefile.common	31 Oct 2012 11:17:31 -0000	1.18
+++ devel/ncurses/Makefile.common	23 Apr 2013 13:29:15 -0000
@@ -33,6 +33,13 @@ CONFIGURE_ARGS+=	--includedir=${PREFIX}/
 MAKE_JOBS_SAFE=		no
 
 .include "../../mk/bsd.prefs.mk"
+
+.if !empty(USE_CROSS_COMPILE:M[yY][eE][sS])
+TOOL_DEPENDS+=		ncurses-${NC_VERS}:../../devel/ncurses
+CONFIGURE_ENV+=		BUILD_CC=${NATIVE_CC:Q}
+CONFIGURE_ENV+=		ac_cv_path_TIC_PATH=${LOCALBASE}/bin/tic
+.endif
+
 .if !defined(TOOLS_TBL)
 # This means that groff needs to be built to get tbl(1).
 # We can only build groff if there is a builtin implementation of curses,