fix wim's commit

Original commit message from CVS:
fix wim's commit
diff --git a/gst/videorate/Makefile.am b/gst/videorate/Makefile.am
index 66c1af5..d49831b 100644
--- a/gst/videorate/Makefile.am
+++ b/gst/videorate/Makefile.am
@@ -1,3 +1,5 @@
+noinst_HEADERS = gstvideorate.h
+
 plugin_LTLIBRARIES = libgstvideorate.la
 
 libgstvideorate_la_SOURCES = gstvideorate.c