[PATCH, obvious] nds32: constify ptr_arg

[tbsaunde+binutils@tbsaunde.org]

From: Trevor Saunders <tbsaunde+binutils@tbsaunde.org>

it points to the result of strchr on a const char *, so it aliases
something that is const.  Further its only passed to a function that expects a
const char *, so there's no reason for it to not be const.

built cross to nds32be-elf, committing as obvious.

Thanks!

Trev


gas/ChangeLog:

2016-06-05  Trevor Saunders  <tbsaunde+binutils@tbsaunde.org>

	* config/tc-nds32.c (nds32_parse_option): Make the type of ptr_arg
	const char *.
---
 gas/config/tc-nds32.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gas/config/tc-nds32.c b/gas/config/tc-nds32.c
index 888e8aa..1d1a80e 100644
--- a/gas/config/tc-nds32.c
+++ b/gas/config/tc-nds32.c
@@ -3193,7 +3193,7 @@ nds32_parse_option (int c, const char *arg)
 {
   struct nds32_parse_option_table *coarse_tune;
   struct nds32_set_option_table *fine_tune;
-  char *ptr_arg = NULL;
+  const char *ptr_arg = NULL;
 
   switch (c)
     {
-- 
2.7.4