Like %pK already does, print "00000000" instead.

This confused people -- the convention is that "(null)" means you tried to
dereference a null pointer as opposed to printing the address.

Signed-off-by: Adam Borowski <kilob...@angband.pl>
---
 lib/vsprintf.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/vsprintf.c b/lib/vsprintf.c
index 77ee6ced11b1..d7a708f82559 100644
--- a/lib/vsprintf.c
+++ b/lib/vsprintf.c
@@ -1849,7 +1849,7 @@ char *pointer(const char *fmt, char *buf, char *end, void 
*ptr,
 {
        const int default_width = 2 * sizeof(void *);
 
-       if (!ptr && *fmt != 'K') {
+       if (!ptr && *fmt != 'K' && *fmt != 'x') {
                /*
                 * Print (null) with the same width as a pointer so it makes
                 * tabular output look nice.
-- 
2.15.1

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