[PATCH] gccrs: Use nullptr instead of NULL in rust-lang.cc

[Ata Borla]

Replace NULL with nullptr in C++ files i want refactor other gccrs files if can 
i permission i can refactor old null macros to nullptr

gcc/rust/ChangeLog:

        * rust-lang.cc (grs_langhook_type_for_mode): changed NULL macros to 
nullptr.
        * rust-lang.cc (grs_langhook_pushdecl): Likewise.
        * rust-lang.cc (grs_langhook_getdecls): Likewise.

Signed-off-by: Ata Borla  <chessy.gnu....@gmail.com>
---
 gcc/rust/rust-lang.cc | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/gcc/rust/rust-lang.cc b/gcc/rust/rust-lang.cc
index 44b8daa110d..ccaf4a9a91d 100644
--- a/gcc/rust/rust-lang.cc
+++ b/gcc/rust/rust-lang.cc
@@ -224,7 +224,7 @@ grs_langhook_type_for_mode (machine_mode mode, int 
unsignedp)
                        : int_n_trees[i].signed_type);
 
   /* rust_unreachable */
-  return NULL;
+  return nullptr;
 }
 
 // Record a builtin function.
@@ -256,7 +256,7 @@ static tree
 grs_langhook_pushdecl (tree decl ATTRIBUTE_UNUSED)
 {
   // rust_unreachable ();
-  return NULL;
+  return nullptr;
 }
 
 /* This hook is used to get the current list of declarations as trees.
@@ -266,7 +266,7 @@ static tree
 grs_langhook_getdecls (void)
 {
   // rust_unreachable();
-  return NULL;
+  return nullptr;
 }
 
 // Handle Rust-specific options. Return false if nothing happened.
-- 
2.56.0