[gthumb] initialize some constanst to remove some compiler warnings

[Paolo Bacchilega <paobac src gnome org>]

commit 2b83825462194dd1b62e76021b12176a3e76825a
Author: Paolo Bacchilega <paobac src gnome org>
Date:   Sun Oct 16 12:08:58 2011 +0200

    initialize some constanst to remove some compiler warnings

 extensions/catalogs/gth-organize-task.c            |    2 +-
 extensions/contact_sheet/dlg-contact-sheet.c       |    5 ++++-
 extensions/contact_sheet/dlg-image-wall.c          |    5 ++++-
 extensions/gstreamer_tools/gth-media-viewer-page.c |    2 +-
 4 files changed, 10 insertions(+), 4 deletions(-)
---
diff --git a/extensions/catalogs/gth-organize-task.c b/extensions/catalogs/gth-organize-task.c
index 3795628..5ccfb45 100644
--- a/extensions/catalogs/gth-organize-task.c
+++ b/extensions/catalogs/gth-organize-task.c
@@ -541,7 +541,7 @@ static void
 gth_organize_task_exec (GthTask *base)
 {
 	GthOrganizeTask *self;
-	const char      *attributes;
+	const char      *attributes = "";
 
 	self = GTH_ORGANIZE_TASK (base);
 
diff --git a/extensions/contact_sheet/dlg-contact-sheet.c b/extensions/contact_sheet/dlg-contact-sheet.c
index d02546a..f4f497b 100644
--- a/extensions/contact_sheet/dlg-contact-sheet.c
+++ b/extensions/contact_sheet/dlg-contact-sheet.c
@@ -268,13 +268,16 @@ entry_help_icon_press_cb (GtkEntry             *entry,
 			  gpointer              user_data)
 {
 	DialogData *data = user_data;
-	GtkWidget  *help_box;
+	GtkWidget  *help_box = NULL;
 
 	if (GTK_WIDGET (entry) == GET_WIDGET ("footer_entry"))
 		help_box = GET_WIDGET ("page_footer_help_table");
 	else if (GTK_WIDGET (entry) == GET_WIDGET ("template_entry"))
 		help_box = GET_WIDGET ("template_help_table");
 
+	if (help_box == NULL)
+		return;
+
 	if (gtk_widget_get_visible (help_box))
 		gtk_widget_hide (help_box);
 	else
diff --git a/extensions/contact_sheet/dlg-image-wall.c b/extensions/contact_sheet/dlg-image-wall.c
index a361171..6aefe73 100644
--- a/extensions/contact_sheet/dlg-image-wall.c
+++ b/extensions/contact_sheet/dlg-image-wall.c
@@ -203,11 +203,14 @@ entry_help_icon_press_cb (GtkEntry             *entry,
 			  gpointer              user_data)
 {
 	DialogData *data = user_data;
-	GtkWidget  *help_box;
+	GtkWidget  *help_box = NULL;
 
 	if (GTK_WIDGET (entry) == GET_WIDGET ("template_entry"))
 		help_box = GET_WIDGET ("template_help_table");
 
+	if (help_box == NULL)
+		return;
+
 	if (gtk_widget_get_visible (help_box))
 		gtk_widget_hide (help_box);
 	else
diff --git a/extensions/gstreamer_tools/gth-media-viewer-page.c b/extensions/gstreamer_tools/gth-media-viewer-page.c
index 8563ef7..2a0bf43 100644
--- a/extensions/gstreamer_tools/gth-media-viewer-page.c
+++ b/extensions/gstreamer_tools/gth-media-viewer-page.c
@@ -529,7 +529,7 @@ static int
 get_nearest_rate (double rate)
 {
 	int    min_idx = -1;
-	double min_delta;
+	double min_delta = 0;
 	int    i;
 
 	for (i = 0; i < G_N_ELEMENTS (default_rates); i++) {