* add header file to sources list so make dist works

This commit was SVN r11357.

orte/mca/gpr/null/Makefile.am

@@ -18,7 +18,8 @@
 
 sources = \
         gpr_null_component.c \
-        gpr_null.c
+        gpr_null.c \
+	gpr_null.h
 
 # Make the output library in this directory, and name it either
 # mca_<type>_<name>.la (for DSO builds) or libmca_<type>_<name>.la