C++ PATCH to make a message translatable (PR translation/79705)

[Marek Polacek]

This PR complains that a message is not marked for translation.  Also make
the pointer const for the benefit of -Wformat.

Bootstrapped/regtested on x86_64-linux, ok for trunk?

2017-02-24  Marek Polacek  <pola...@redhat.com>

        PR translation/79705
        * decl.c (check_redeclaration_exception_specification): Mark a string
        for translation.  Make the pointer const.

diff --git gcc/cp/decl.c gcc/cp/decl.c
index fa1d645..3dd1f5c 100644
--- gcc/cp/decl.c
+++ gcc/cp/decl.c
@@ -1273,8 +1273,8 @@ check_redeclaration_exception_specification (tree 
new_decl,
   if (! DECL_IS_BUILTIN (old_decl)
       && !comp_except_specs (new_exceptions, old_exceptions, ce_normal))
     {
-      const char *msg
-       = "declaration of %qF has a different exception specifier";
+      const char *const msg
+       = G_("declaration of %qF has a different exception specifier");
       bool complained = true;
       location_t new_loc = DECL_SOURCE_LOCATION (new_decl);
       if (DECL_IN_SYSTEM_HEADER (old_decl))

        Marek