[gthumb] fixed other warnings

[Paolo Bacchilega <paobac src gnome org>]

commit 7f77c61a08eb061f253e602cede0a5f557a50eab
Author: Paolo Bacchilega <paobac src gnome org>
Date:   Wed Aug 17 19:17:04 2016 +0200

    fixed other warnings

 .../file_tools/gth-file-tool-adjust-contrast.c     |    3 +++
 gthumb/gio-utils.c                                 |    2 +-
 gthumb/gth-time-selector.c                         |   14 ++++++++++++--
 gthumb/gth-window.c                                |    2 +-
 4 files changed, 17 insertions(+), 4 deletions(-)
---
diff --git a/extensions/file_tools/gth-file-tool-adjust-contrast.c 
b/extensions/file_tools/gth-file-tool-adjust-contrast.c
index 478bdcf..f413ac2 100644
--- a/extensions/file_tools/gth-file-tool-adjust-contrast.c
+++ b/extensions/file_tools/gth-file-tool-adjust-contrast.c
@@ -91,6 +91,7 @@ get_histogram_value (GthHistogram        *histogram,
                     Method               method)
 {
        double h = gth_histogram_get_value (histogram, channel, bin);
+
        switch (method) {
        case METHOD_EQUALIZE_SQUARE_ROOT:
                return (h >= 2) ? sqrt (h) : h;
@@ -99,6 +100,8 @@ get_histogram_value (GthHistogram        *histogram,
        default:
                g_assert_not_reached ();
        }
+
+       return 0;
 }
 
 
diff --git a/gthumb/gio-utils.c b/gthumb/gio-utils.c
index 5fcb384..9bb383d 100644
--- a/gthumb/gio-utils.c
+++ b/gthumb/gio-utils.c
@@ -2602,7 +2602,7 @@ _g_directory_make (GFile    *file,
                   GError  **error)
 {
        if (! g_file_make_directory (file, NULL, error)) {
-               if (! (*error)->code == G_IO_ERROR_EXISTS)
+               if ((*error)->code != G_IO_ERROR_EXISTS)
                        return FALSE;
                g_clear_error (error);
        }
diff --git a/gthumb/gth-time-selector.c b/gthumb/gth-time-selector.c
index 1819904..9d6ffa6 100644
--- a/gthumb/gth-time-selector.c
+++ b/gthumb/gth-time-selector.c
@@ -92,6 +92,16 @@ gth_time_selector_unmap (GtkWidget *widget)
 }
 
 
+gboolean
+gth_time_selector_real_focus (GtkWidget        *base,
+                             GtkDirectionType  direction)
+{
+       GthTimeSelector *self = GTH_TIME_SELECTOR (base);
+       gtk_widget_grab_focus (self->priv->date_entry);
+       return TRUE;
+}
+
+
 static void
 gth_time_selector_class_init (GthTimeSelectorClass *class)
 {
@@ -105,7 +115,7 @@ gth_time_selector_class_init (GthTimeSelectorClass *class)
 
        widget_class = (GtkWidgetClass *) class;
        widget_class->unmap = gth_time_selector_unmap;
-       widget_class->focus = gth_time_selector_focus;
+       widget_class->focus = gth_time_selector_real_focus;
 
        gth_time_selector_signals[CHANGED] =
                g_signal_new ("changed",
@@ -751,5 +761,5 @@ gth_time_selector_get_value (GthTimeSelector *self,
 void
 gth_time_selector_focus (GthTimeSelector *self)
 {
-       gtk_widget_grab_focus (self->priv->date_entry);
+       gth_time_selector_real_focus (GTK_WIDGET (self), GTK_DIR_RIGHT);
 }
diff --git a/gthumb/gth-window.c b/gthumb/gth-window.c
index 03503da..4ff143e 100644
--- a/gthumb/gth-window.c
+++ b/gthumb/gth-window.c
@@ -147,7 +147,7 @@ _gth_window_add_header_bar (GthWindow *self)
        gtk_widget_show (self->priv->headerbar);
        gtk_header_bar_set_show_close_button (GTK_HEADER_BAR (self->priv->headerbar), TRUE);
 
-       g_object_add_weak_pointer (G_OBJECT (self->priv->headerbar), &self->priv->headerbar);
+       g_object_add_weak_pointer (G_OBJECT (self->priv->headerbar), (gpointer *) &self->priv->headerbar);
 
 #if GTK_CHECK_VERSION(3,12,0)
        {