[easytag] Use g_str_empty() for more empty string checks

[David King <davidk src gnome org>]

commit b32f9f1370bf03ffe78c476d8d78cb2092e395a0
Author: David King <amigadave amigadave com>
Date:   Wed Mar 25 19:42:40 2015 +0100

    Use g_str_empty() for more empty string checks

 src/browser.c       |    3 ++-
 src/tag_area.c      |    2 +-
 src/tags/flac_tag.c |    2 +-
 3 files changed, 4 insertions(+), 3 deletions(-)
---
diff --git a/src/browser.c b/src/browser.c
index fa0809a..b45c82d 100644
--- a/src/browser.c
+++ b/src/browser.c
@@ -4155,7 +4155,8 @@ et_browser_show_rename_directory_dialog (EtBrowser *self)
 
     /* We get the full path but we musn't display the parent directories */
     directory_parent = g_strdup(priv->current_path);
-    if (!directory_parent || strlen(directory_parent) == 0)
+
+    if (et_str_empty (directory_parent))
     {
         g_free(directory_parent);
         return;
diff --git a/src/tag_area.c b/src/tag_area.c
index e249663..36eb1a0 100644
--- a/src/tag_area.c
+++ b/src/tag_area.c
@@ -1164,7 +1164,7 @@ Parse_Date (EtTagArea *self)
     /* Get the info entered by user */
     year = gtk_entry_get_text (GTK_ENTRY (priv->year_entry));
 
-    if (strcmp (year,"") != 0 && strlen (year) < 4)
+    if (!et_str_empty (year) && strlen (year) < 4)
     {
         GDateTime *dt;
         gchar *tmp, *tmp1;
diff --git a/src/tags/flac_tag.c b/src/tags/flac_tag.c
index f2f4f01..dd98374 100644
--- a/src/tags/flac_tag.c
+++ b/src/tags/flac_tag.c
@@ -753,7 +753,7 @@ static gboolean Flac_Write_Delimetered_Tag (FLAC__StreamMetadata *vc_block, cons
     
     for (i=0;i<g_strv_length(strings);i++)
     {
-        if (strlen(strings[i])>0)
+        if (!et_str_empty (strings[i]))
         {
             Flac_Write_Tag(vc_block, tag_name, strings[i]);
         }