libgo patch committed: Fix handling of getaddrinfo return type

libgo patch committed: Fix handling of getaddrinfo return type

[Ian Lance Taylor]

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This libgo patch declares the return type of the C getaddrinfo
function, when called from Go, as int32 rather than int.  That is
important because getaddrinfo returns negative numbers on error, and
so numbers like -2 in int32 were being treated as 0xfffffffe in int,
which in Go is a 64 bit type.  This caused comparisons against
EAI_NONAME, etc., to fail.  This fixes https://golang.org/issue/23645.
Bootstrapped and ran Go testsuite on x86_64-pc-linux-gnu.  Committed
to mainline.

Ian

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Index: gcc/go/gofrontend/MERGE
===================================================================
--- gcc/go/gofrontend/MERGE	(revision 257280)
+++ gcc/go/gofrontend/MERGE	(working copy)
@@ -1,4 +1,4 @@
-71758f9ca1804743afe178f0e2fca489e0217474
+b833695618d1a5d9d531f5ba0f9c07c7e35e0073
 
 The first line of this file holds the git revision number of the last
 merge done from the gofrontend repository.
Index: libgo/go/net/cgo_unix.go
===================================================================
--- libgo/go/net/cgo_unix.go	(revision 257217)
+++ libgo/go/net/cgo_unix.go	(working copy)
@@ -23,7 +23,7 @@ import (
 )
 
 //extern getaddrinfo
-func libc_getaddrinfo(node *byte, service *byte, hints *syscall.Addrinfo, res **syscall.Addrinfo) int
+func libc_getaddrinfo(node *byte, service *byte, hints *syscall.Addrinfo, res **syscall.Addrinfo) int32
 
 //extern freeaddrinfo
 func libc_freeaddrinfo(res *syscall.Addrinfo)