[evince] Improve mime type detection on win32

[Jan-Joost Spanjers <jspanjers src gnome org>]

commit 7802664fef53b83c32548e2f477083cc47ee06cc
Author: Hib Eris <hib hiberis nl>
Date:   Mon Nov 7 14:05:07 2011 +0100

    Improve mime type detection on win32

 libdocument/ev-file-helpers.c |   18 ++++++++++--------
 1 files changed, 10 insertions(+), 8 deletions(-)
---
diff --git a/libdocument/ev-file-helpers.c b/libdocument/ev-file-helpers.c
index cab0ad5..5662e9e 100644
--- a/libdocument/ev-file-helpers.c
+++ b/libdocument/ev-file-helpers.c
@@ -455,7 +455,6 @@ get_mime_type_from_uri (const gchar *uri, GError **error)
 static gchar *
 get_mime_type_from_data (const gchar *uri, GError **error)
 {
-#ifndef G_OS_WIN32
 	GFile            *file;
 	GFileInputStream *input_stream;
 	gssize            size_read;
@@ -492,16 +491,19 @@ get_mime_type_from_data (const gchar *uri, GError **error)
 	if (!content_type)
 		return NULL;
 
+#ifdef G_OS_WIN32
+	/* On Windows, the implementation of g_content_type_guess() is 
+	 * sometimes too limited, so we do use get_mime_type_from_uri() 
+	 * as a fallback */
+	if (strcmp (content_type, "*") == 0) {
+		g_free (content_type);
+		return get_mime_type_from_uri (uri, error);
+	}
+#endif /* G_OS_WIN32 */
+
 	mime_type = g_content_type_get_mime_type (content_type);
 	g_free (content_type);
 	return mime_type;
-#else
-	/*
-	 * On Windows, the implementation of g_content_type_guess() is too limited at the moment, so we do not
-	 * use it and fall back to get_mime_type_from_uri()
-	 */
-	return get_mime_type_from_uri (uri, error);
-#endif /* G_OS_WIN32 */
 }
 
 /**