fixed missing libgis refs

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@38709 15284696-431f-4ddb-bdfa-cd5b030d7da7

lib/dspf/Makefile

@@ -1,5 +1,6 @@
 MODULE_TOPDIR = ../..
 
+EXTRA_LIBS=$(GISLIB)
 LIB_NAME = $(DSPF_LIBNAME)
 
 include $(MODULE_TOPDIR)/include/Make/Lib.make

lib/dspf/cube_io.c

@@ -1,4 +1,5 @@
 #include <stdlib.h>
+#include <grass/gis.h>
 #include "viz.h"
 
 static unsigned char Buffer[10000];	/* buffer for outputting data to file */

lib/dspf/dspf_header.c

@@ -1,4 +1,5 @@
 #include <string.h>
+#include <grass/gis.h>
 #include "viz.h"