Bug fix in pointer modifiers inherent at function degeneration.

In reply to Randy's email:

The following case cause warning about different signedness of pointer.
The pointer should not have signedness at all.

struct sk_buff;
struct sock;

extern int skb_append_datato_frags(struct sock *sk, struct sk_buff *skb,
			int getfrag(void *from, char *to, int offset,
			int len,int odd, struct sk_buff *skb),
			void *from, int length);

int skb_append_datato_frags(struct sock *sk, struct sk_buff *skb,
			int (*getfrag)(void *from, char *to, int offset,
			int len,int odd, struct sk_buff *skb),
			void *from, int length)

{
	return 0;
}

Index: sparse/symbol.h
===================================================================
--- sparse.orig/symbol.h	2007-02-09 15:03:07.000000000 -0800
+++ sparse/symbol.h	2007-02-09 15:03:09.000000000 -0800
@@ -191,6 +191,7 @@ struct symbol {
 #define MOD_SIZE	(MOD_CHAR | MOD_SHORT | MOD_LONG | MOD_LONGLONG)
 #define MOD_IGNORE (MOD_TOPLEVEL | MOD_STORAGE | MOD_ADDRESSABLE |	\
 	MOD_ASSIGNED | MOD_USERTYPE | MOD_FORCE | MOD_ACCESSED | MOD_EXPLICITLY_SIGNED)
+#define MOD_PTRINHERIT (MOD_VOLATILE | MOD_CONST | MOD_NODEREF | MOD_STORAGE)
 
 
 /* Current parsing/evaluation function */
Index: sparse/evaluate.c
===================================================================
--- sparse.orig/evaluate.c	2007-02-09 15:03:07.000000000 -0800
+++ sparse/evaluate.c	2007-02-09 15:03:09.000000000 -0800
@@ -1282,7 +1282,7 @@ static void examine_fn_arguments(struct 
 				else
 					ptr->ctype.base_type = arg;
 				ptr->ctype.as |= s->ctype.as;
-				ptr->ctype.modifiers |= s->ctype.modifiers;
+				ptr->ctype.modifiers |= s->ctype.modifiers & MOD_PTRINHERIT;
 
 				s->ctype.base_type = ptr;
 				s->ctype.as = 0;
@@ -1313,8 +1313,6 @@ static struct symbol *convert_to_as_mod(
 	return sym;
 }
 
-#define MOD_PTRINHERIT (MOD_VOLATILE | MOD_CONST | MOD_NODEREF | MOD_STORAGE)
-
 static struct symbol *create_pointer(struct expression *expr, struct symbol *sym, int degenerate)
 {
 	struct symbol *node = alloc_symbol(expr->pos, SYM_NODE);