in gstglfiltershader.c when reading shader file content, use incorrect variable to determine file size, leads none shader file read. and here's a quick fix


fseek does not return file size, ftell does

--- a/gst/gl/gstglfiltershader.c        2013-06-20 15:59:21.095105994 +0800
+++ b/gst/gl/gstglfiltershader.c        2013-06-20 17:03:45.969051269 +0800
@@ -259,6 +259,7 @@

   size_t count;
   size_t bytes;
+  int seek_result;
   FILE *f;

   // read the filter from file
@@ -274,7 +275,21 @@
     *storage = 0;
   }

-  count = fseek (f, 0, SEEK_END);
+  seek_result = fseek (f, 0, SEEK_END);
+
+  if (seek_result != 0){
+    GST_ERROR ("could not seek file: %s", filename);
+    return -1;
+  }
+
+  count = ftell (f);
+
+  if (count == -1){
+    GST_ERROR ("could not seek file: %s", filename);
+    return -1;
+  }
+
+
   *storage = g_malloc (count + 1);
   if (!*storage) {
     GST_ERROR ("g_malloc failed: %lud", (gulong) count);