moved unsied files, compiles w/o waringins with clang

FossilOrigin-Name: 1189a474bfcc28195d888d7967ccfc50c812f194e1ee19e99d3cb244d666a19a

src/cw/mavl_del.c

@@ -238,11 +238,11 @@ void *mavl_del(struct mavl *t, const void *data)
 	if (!t->root)
 		return NULL;
 
-	d = data;
+	d = (void*)data;
 	rc = mavl_del0(t, &t->root, d);
 	if (rc == 2)
 		return NULL;
-	return data;
+	return (void*)data;
 }