[gcc r14-4869] syscall: add missing type conversion

[Ian Lance Taylor <ian@gcc.gnu.org>]

https://gcc.gnu.org/g:2621bd1bac614b63e52d0deb4ab2ff287a9fafa8

commit r14-4869-g2621bd1bac614b63e52d0deb4ab2ff287a9fafa8
Author: Ian Lance Taylor <iant@golang.org>
Date:   Thu Oct 19 16:46:14 2023 -0700

    syscall: add missing type conversion
    
    The gofrontend incorrectly accepted code that was missing a type conversion.
    The test case for this is bug518.go in https://go.dev/cl/536537.
    Future CLs in this series will detect the type error.
    
    Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/536638

Diff:
---
 gcc/go/gofrontend/MERGE    | 2 +-
 libgo/go/syscall/errstr.go | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/gcc/go/gofrontend/MERGE b/gcc/go/gofrontend/MERGE
index 398d2671b64d..0f961157dfd1 100644
--- a/gcc/go/gofrontend/MERGE
+++ b/gcc/go/gofrontend/MERGE
@@ -1,4 +1,4 @@
-c201fa2a684ada551ca9a0825a3075a0a69498de
+081ec9824a74ec9d82628d8d2f6b9a7a4c35a529
 
 The first line of this file holds the git revision number of the last
 merge done from the gofrontend repository.
diff --git a/libgo/go/syscall/errstr.go b/libgo/go/syscall/errstr.go
index 9f688e2a0c7b..02f228adc59d 100644
--- a/libgo/go/syscall/errstr.go
+++ b/libgo/go/syscall/errstr.go
@@ -24,7 +24,7 @@ func Errstr(errnum int) string {
 			}
 			return string(b[:i])
 		}
-		if errno != ERANGE {
+		if Errno(errno) != ERANGE {
 			return "strerror_r failure"
 		}
 	}