Reapply b34137

... which fixes <panel.h> detection on Alpine Linux (which has ncursesw
but installs it into plain /usr/include).

Signed-off-by: Alexey Neyman <stilor@att.net>

m4/ax_with_curses_extra.m4

@@ -212,6 +212,9 @@ AC_DEFUN([_AX_WITH_CURSES_EXTRA], [
     ], [
         AS_IF([test "x$ax_cv_curses_which" = xncursesw], [
             _AX_WITH_CURSES_CHECKEXTRA([$1], [$2], [$3], [ncursesw/$4], [$5])
+            AS_IF([test x$[]ax_cv_[]m4_tolower($1) != "xyes"], [
+		_AX_WITH_CURSES_CHECKEXTRA([$1], [$2], [$3], [$4], [$6])
+            ])
         ], [test "x$ax_cv_curses_which" = xncurses], [
             _AX_WITH_CURSES_CHECKEXTRA([$1], [$2], [$3], [$4], [$6])
             AS_IF([test x$[]ax_cv_[]m4_tolower($1) != "xyes"], [