[gnome-settings-daemon] Fix screen mapping for Cintiqs and others

[Carlos Garnacho <carlosg src gnome org>]

commit 9b08637bc3c907886b03accad6f9f4b1a2a575dc
Author: Benjamin Tissoires <benjamin tissoires redhat com>
Date:   Thu Nov 2 10:24:43 2017 +0100

    Fix screen mapping for Cintiqs and others
    
    Size-based input/output matching doesn't raise the "found" flag, which
    would result on input_info_guess_candidates() still trying to assign the
    builtin output to the input device if that is the only match found.
    
    For screen integrated devices (i.e. not on the builtin output) this is
    and undesirable possibility, setting the "found" flag to TRUE results on
    the correct output being assigned.
    
    Signed-off-by: Benjamin Tissoires <benjamin tissoires redhat com>
    
    https://bugzilla.gnome.org/show_bug.cgi?id=748589

 plugins/common/gsd-device-mapper.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/plugins/common/gsd-device-mapper.c b/plugins/common/gsd-device-mapper.c
index fae4150..d4f7bc3 100644
--- a/plugins/common/gsd-device-mapper.c
+++ b/plugins/common/gsd-device-mapper.c
@@ -257,6 +257,7 @@ input_info_guess_candidates (GsdInputInfo  *input,
 
        if (input->capabilities & GSD_INPUT_IS_SCREEN_INTEGRATED) {
                outputs[GSD_PRIO_MATCH_SIZE] = input_info_find_size_match (input, input->mapper->rr_screen);
+               found |= outputs[GSD_PRIO_MATCH_SIZE] != NULL;
        }
 
        split = g_strsplit (name, " ", -1);