Work on ansi and clean Makefiles

FossilOrigin-Name: 0805f78d34219a2aac597a313081ce869c389e6b5d471c65c7f43d0906c0a400

src/cw/mavl_replace.c

@@ -0,0 +1,12 @@
+#include "mavl.h"
+
+void *mavl_replace(struct mavl *t,void *data){
+	struct mavlnode * node = mavl_get_node(t,data);
+	if (node){
+		t->del(node->data);
+		return node->data=data;	
+	}
+	return mavl_add(t,data);
+}
+
+