Changed GSM_API to GRGSM_API so gr_modtool created blocks don't have to be modified
diff --git a/include/grgsm/misc_utils/burst_file_sink.h b/include/grgsm/misc_utils/burst_file_sink.h
index 7263baa..3a567e9 100644
--- a/include/grgsm/misc_utils/burst_file_sink.h
+++ b/include/grgsm/misc_utils/burst_file_sink.h
@@ -34,7 +34,7 @@
      * \ingroup gsm
      *
      */
-    class GSM_API burst_file_sink : virtual public gr::block
+    class GRGSM_API burst_file_sink : virtual public gr::block
     {
      public:
       typedef boost::shared_ptr<burst_file_sink> sptr;