dtcm: fix implicit-function-declaration warnings

cde/programs/dtcm/libDtCmP/resource.c

@@ -67,7 +67,7 @@ static const char       CONTINUATION    = '\\';
 /*
 **  free_resources will step the list of resources and free the allocated space
 */
-extern void
+void
 free_resources(Resource *r) {
 	if (r) {
 		free_resources(r->next);

cde/programs/dtcm/libDtCmP/resource.h

@@ -77,4 +77,6 @@ extern boolean_t	set_resource(Resource**, char*, char*,
 							char*, char*);
 extern boolean_t	set_resource_by_val(Resource**, char*, char*);
 
+extern void free_resources(Resource *r);
+
 #endif