[mutter] wayland: Free selection streams streams after transfer

[Carlos Garnacho <carlosg src gnome org>]

commit dd32ff018afd6dea7f865d8ec194a8e2c514b5de
Author: Sebastian Keller <skeller gnome org>
Date:   Sun Jun 7 15:11:35 2020 +0200

    wayland: Free selection streams streams after transfer
    
    They were only being closed but never freed.
    
    https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1293

 src/wayland/meta-wayland-data-offer-primary-legacy.c | 1 +
 src/wayland/meta-wayland-data-offer-primary.c        | 1 +
 src/wayland/meta-wayland-data-offer.c                | 1 +
 src/wayland/meta-xwayland-dnd.c                      | 1 +
 4 files changed, 4 insertions(+)
---
diff --git a/src/wayland/meta-wayland-data-offer-primary-legacy.c 
b/src/wayland/meta-wayland-data-offer-primary-legacy.c
index ae55a9edcc..5fe9523d3f 100644
--- a/src/wayland/meta-wayland-data-offer-primary-legacy.c
+++ b/src/wayland/meta-wayland-data-offer-primary-legacy.c
@@ -51,6 +51,7 @@ transfer_cb (MetaSelection *selection,
     }
 
   g_output_stream_close (stream, NULL, NULL);
+  g_object_unref (stream);
 }
 
 static void
diff --git a/src/wayland/meta-wayland-data-offer-primary.c b/src/wayland/meta-wayland-data-offer-primary.c
index 98b7b09107..a2a4dfe80b 100644
--- a/src/wayland/meta-wayland-data-offer-primary.c
+++ b/src/wayland/meta-wayland-data-offer-primary.c
@@ -51,6 +51,7 @@ transfer_cb (MetaSelection *selection,
     }
 
   g_output_stream_close (stream, NULL, NULL);
+  g_object_unref (stream);
 }
 
 static void
diff --git a/src/wayland/meta-wayland-data-offer.c b/src/wayland/meta-wayland-data-offer.c
index 800d55144a..fa14fae1ae 100644
--- a/src/wayland/meta-wayland-data-offer.c
+++ b/src/wayland/meta-wayland-data-offer.c
@@ -77,6 +77,7 @@ transfer_cb (MetaSelection *selection,
     }
 
   g_output_stream_close (stream, NULL, NULL);
+  g_object_unref (stream);
 }
 
 static void
diff --git a/src/wayland/meta-xwayland-dnd.c b/src/wayland/meta-xwayland-dnd.c
index 5e9d8f8b34..cd0f0d3eaa 100644
--- a/src/wayland/meta-xwayland-dnd.c
+++ b/src/wayland/meta-xwayland-dnd.c
@@ -367,6 +367,7 @@ transfer_cb (MetaSelection *selection,
     }
 
   g_output_stream_close (stream, NULL, NULL);
+  g_object_unref (stream);
 }
 
 static void