[COMMITTED] print-tree:Avoid warnings of overflow

[Qian Jianhua via Gcc-patches]

This patch avoids two warnings of "'sprintf' may write a
terminating nul past the end of the destination
[-Wformat-overflow=]" when build GCC.

Tested on x86_64, and committed as obvious.

gcc/ChangeLog:

        * print-tree.cc: Change array length
---
 gcc/print-tree.cc | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/gcc/print-tree.cc b/gcc/print-tree.cc
index 0876da873a9..6d45a4a5966 100644
--- a/gcc/print-tree.cc
+++ b/gcc/print-tree.cc
@@ -776,7 +776,7 @@ print_node (FILE *file, const char *prefix, tree node, int 
indent,
            {
              /* Buffer big enough to format a 32-bit UINT_MAX into, plus
                 the text.  */
-             char temp[15];
+             char temp[16];
 
              sprintf (temp, "arg:%d", i);
              print_node (file, temp, TREE_OPERAND (node, i), indent + 4);
@@ -886,7 +886,7 @@ print_node (FILE *file, const char *prefix, tree node, int 
indent,
              {
              /* Buffer big enough to format a 32-bit UINT_MAX into, plus
                 the text.  */
-               char temp[15];
+               char temp[16];
                sprintf (temp, "elt:%d", i);
                print_node (file, temp, TREE_VEC_ELT (node, i), indent + 4);
              }
-- 
2.18.1