[gimp] plug-ins: update the warning message for dimension of X bitmap cursors.

[Jehan Pagès <jehanp src gnome org>]

commit 22a6e2bb19da4fd2fe6fd347a6ea185abb9b220b
Author: Jehan <jehan girinstud io>
Date:   Mon Jan 8 00:19:34 2018 +0100

    plug-ins: update the warning message for dimension of X bitmap cursors.
    
    After discussing with Mitch and understanding better the X bitmap/pixmap
    history, I make the warning more specific to X bitmap cursors only (not
    pixmap).
    Also I can see our code always exports RGBA data, so I am not quite sure
    if this warning even makes sense since X bitmaps are bicolor maps. On
    the other hand, Mitch tells me that "these days gdk turns pixbufs into
    bitmaps if the x server doesn't support rgba cursors", so maybe that can
    still be of use to warn cursor designers for max compatibility.
    Still that's pretty old compatibility stuff, so let's replace "may" by
    "might".

 plug-ins/common/file-xmc.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/plug-ins/common/file-xmc.c b/plug-ins/common/file-xmc.c
index ce2c462..87f49e2 100644
--- a/plug-ins/common/file-xmc.c
+++ b/plug-ins/common/file-xmc.c
@@ -1764,8 +1764,8 @@ save_image (const gchar *filename,
     {
       g_message (_("Your cursor was successfully exported but it contains one or "
                    "more frames whose width or height is more than %ipx, "
-                   "a historical max dimension value in X11.\n"
-                   "It may be unsupported by some environments."),
+                   "a historical max dimension value for X bitmap cursors.\n"
+                   "It might be unsupported by some environments."),
                    MAX_BITMAP_CURSOR_SIZE);
     }
   if (size_warn)