Skip failing configure checks during cross-compile builds (bug #473372).

--- a/src/configure.ac
+++ b/src/configure.ac
@@ -3441,7 +3441,7 @@ else
 # include <stddef.h>
 #endif
 main() {char *s; s=(char *)tgoto("%p1%d", 0, 1); exit(0); }])],
-			  res="OK", res="FAIL", res="FAIL")
+			  res="OK", res="FAIL", res="OK")
       if test "$res" = "OK"; then
 	break
       fi
@@ -3512,7 +3512,7 @@ main()
     ],[
       vim_cv_tgetent=non-zero
     ],[
-      AC_MSG_ERROR(failed to compile test program.)
+	  vim_cv_tgent=zero
     ])
   ])
 
--