[easytag/wip/ax-compile-warnings: 7/11] Fix const correctness warnings

[David King <davidk src gnome org>]

commit a89de7be85854defb35daadf9335888925f9c40a
Author: David King <amigadave amigadave com>
Date:   Fri Jan 30 14:10:57 2015 +0000

    Fix const correctness warnings

 src/file_area.c       |   21 +++++++++++++--------
 src/scan_dialog.c     |    6 ++++--
 src/tag_area.c        |    4 ++--
 src/tags/ogg_header.c |    2 +-
 4 files changed, 20 insertions(+), 13 deletions(-)
---
diff --git a/src/file_area.c b/src/file_area.c
index dddc311..30eb8f9 100644
--- a/src/file_area.c
+++ b/src/file_area.c
@@ -58,7 +58,7 @@ struct _EtFileAreaPrivate
 
 static void
 on_file_show_header_changed (EtFileArea *self,
-                             gchar *key,
+                             const gchar *key,
                              GSettings *settings)
 {
     EtFileAreaPrivate *priv;
@@ -184,26 +184,31 @@ et_file_area_clear (EtFileArea *self)
 {
     EtFileAreaPrivate *priv;
     EtFileHeaderFields fields;
+    gchar *empty_str;
 
     g_return_if_fail (ET_FILE_AREA (self));
 
     priv = et_file_area_get_instance_private (self);
 
+    empty_str = g_strdup ("");
+
     /* Default values are MPEG data. */
     fields.description = _("File");
     fields.version_label = _("Encoder:");
-    fields.version =  "";
-    fields.bitrate = "";
-    fields.samplerate = "";
+    fields.version =  empty_str;
+    fields.bitrate = empty_str;
+    fields.samplerate = empty_str;
     fields.mode_label = _("Mode:");
-    fields.mode = "";
-    fields.size = "";
-    fields.duration = "";
+    fields.mode = empty_str;
+    fields.size = empty_str;
+    fields.duration = empty_str;
 
     et_file_area_set_header_fields (self, &fields);
 
-    gtk_entry_set_text (GTK_ENTRY (priv->name_entry), "");
+    gtk_entry_set_text (GTK_ENTRY (priv->name_entry), empty_str);
     gtk_label_set_text (GTK_LABEL (priv->index_label), "0/0:");
+
+    g_free (empty_str);
 }
 
 void
diff --git a/src/scan_dialog.c b/src/scan_dialog.c
index fcf4b3f..7c58eb5 100644
--- a/src/scan_dialog.c
+++ b/src/scan_dialog.c
@@ -1579,7 +1579,9 @@ Scan_Process_Fields (EtScanDialog *self, ET_File *ETFile)
  * Function when you select an item of the option menu
  */
 static void
-on_scan_mode_changed (EtScanDialog *self, gchar *key, GSettings *settings)
+on_scan_mode_changed (EtScanDialog *self,
+                      const gchar *key,
+                      GSettings *settings)
 {
     EtScanDialogPrivate *priv;
     EtScanMode mode;
@@ -1827,7 +1829,7 @@ Process_Fields_First_Letters_Check_Button_Toggled (EtScanDialog *self)
  */
 static void
 on_process_fields_changed (EtScanDialog *self,
-                           gchar *key,
+                           const gchar *key,
                            GSettings *settings)
 {
     EtScanDialogPrivate *priv;
diff --git a/src/tag_area.c b/src/tag_area.c
index 9ef3ce5..cb452a8 100644
--- a/src/tag_area.c
+++ b/src/tag_area.c
@@ -2107,8 +2107,8 @@ create_tag_area (EtTagArea *self)
     GtkBuilder *builder;
     GError *error = NULL;
 
-    /* For Picture. */
-    static const GtkTargetEntry drops[] = { { "text/uri-list", 0,
+    /* For Picture. Ignore const string warning. */
+    static const GtkTargetEntry drops[] = { { (gchar *)"text/uri-list", 0,
                                               TARGET_URI_LIST } };
     GtkTreeSelection *selection;
 
diff --git a/src/tags/ogg_header.c b/src/tags/ogg_header.c
index beb585b..ed601ef 100644
--- a/src/tags/ogg_header.c
+++ b/src/tags/ogg_header.c
@@ -274,7 +274,7 @@ et_ogg_header_read_file_info (GFile *file,
                     message = _("Internal logic fault, indicates a bug or heap/stack corruption");
                     break;
                 default:
-                    message = "";
+                    message = _("Error reading tags from file");
                     break;
             }