[gthumb] task: define the for-viewer property as boolean

[Paolo Bacchilega <paobac src gnome org>]

commit c1335cf6f276a270e058da7e54eabb268d006491
Author: Paolo Bacchilega <paobac src gnome org>
Date:   Thu Apr 22 09:47:09 2021 +0200

    task: define the for-viewer property as boolean

 gthumb/gth-task.c | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)
---
diff --git a/gthumb/gth-task.c b/gthumb/gth-task.c
index 374be5d4..a792ec64 100644
--- a/gthumb/gth-task.c
+++ b/gthumb/gth-task.c
@@ -118,7 +118,9 @@ gth_task_set_property (GObject      *object,
                break;
        case PROP_FOR_VIEWER:
                self->priv->for_viewer = g_value_get_boolean (value);
+               break;
        default:
+               G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
                break;
        }
 }
@@ -173,11 +175,11 @@ gth_task_class_init (GthTaskClass *class)
 
        g_object_class_install_property (object_class,
                                         PROP_FOR_VIEWER,
-                                        g_param_spec_string ("for-viewer",
-                                                             "For Viewer",
-                                                             "Whether this task is needed by the current 
viewer. It is cancelled if the viewer is closed.",
-                                                             NULL,
-                                                             G_PARAM_READWRITE));
+                                        g_param_spec_boolean ("for-viewer",
+                                                              "For Viewer",
+                                                              "Whether this task is needed by the current 
viewer. It is cancelled if the viewer is closed.",
+                                                              FALSE,
+                                                              G_PARAM_READWRITE));
 
        /* signals */
 
@@ -228,6 +230,7 @@ gth_task_init (GthTask *self)
        self->priv->cancellable = NULL;
        self->priv->cancellable_cancelled = 0;
        self->priv->description = NULL;
+       self->priv->for_viewer = FALSE;
 }