Pacify --enable-gcc-warnings on Ubuntu 17.10 x86-64

* src/process.c (Fmake_network_process):
Avoid duplicate test of NILP (host), which apparently confuses
GCC into thinking that portstringlen might be used uninitialized.

diff --git a/src/process.c b/src/process.c
index a4f016fc25bb1713921d583bb3cb11f81a3c7853..3a8bcfb3fcf8e71755ec3f2937a8b61aa246ecc5 100644 (file)
--- a/src/process.c
+++ b/src/process.c
@@ -3835,7 +3835,6 @@ usage: (make-network-process &rest ARGS)  */)
   Lisp_Object contact;
   struct Lisp_Process *p;
   const char *portstring UNINIT;
-  ptrdiff_t portstringlen ATTRIBUTE_UNUSED;
   char portbuf[INT_BUFSIZE_BOUND (EMACS_INT)];
 #ifdef HAVE_LOCAL_SOCKETS
   struct sockaddr_un address_un;
@@ -3982,6 +3981,8 @@ usage: (make-network-process &rest ARGS)  */)
 
   if (!NILP (host))
     {
+      ptrdiff_t portstringlen ATTRIBUTE_UNUSED;
+
       /* SERVICE can either be a string or int.
         Convert to a C string for later use by getaddrinfo.  */
       if (EQ (service, Qt))
@@ -4000,37 +4001,38 @@ usage: (make-network-process &rest ARGS)  */)
          portstring = SSDATA (service);
          portstringlen = SBYTES (service);
        }
-    }
 
 #ifdef HAVE_GETADDRINFO_A
-  if (!NILP (host) && !NILP (Fplist_get (contact, QCnowait)))
-    {
-      ptrdiff_t hostlen = SBYTES (host);
-      struct req
-      {
-       struct gaicb gaicb;
-       struct addrinfo hints;
-       char str[FLEXIBLE_ARRAY_MEMBER];
-      } *req = xmalloc (FLEXSIZEOF (struct req, str,
-                                   hostlen + 1 + portstringlen + 1));
-      dns_request = &req->gaicb;
-      dns_request->ar_name = req->str;
-      dns_request->ar_service = req->str + hostlen + 1;
-      dns_request->ar_request = &req->hints;
-      dns_request->ar_result = NULL;
-      memset (&req->hints, 0, sizeof req->hints);
-      req->hints.ai_family = family;
-      req->hints.ai_socktype = socktype;
-      strcpy (req->str, SSDATA (host));
-      strcpy (req->str + hostlen + 1, portstring);
-
-      int ret = getaddrinfo_a (GAI_NOWAIT, &dns_request, 1, NULL);
-      if (ret)
-       error ("%s/%s getaddrinfo_a error %d", SSDATA (host), portstring, ret);
-
-      goto open_socket;
-    }
+      if (!NILP (Fplist_get (contact, QCnowait)))
+       {
+         ptrdiff_t hostlen = SBYTES (host);
+         struct req
+         {
+           struct gaicb gaicb;
+           struct addrinfo hints;
+           char str[FLEXIBLE_ARRAY_MEMBER];
+         } *req = xmalloc (FLEXSIZEOF (struct req, str,
+                                       hostlen + 1 + portstringlen + 1));
+         dns_request = &req->gaicb;
+         dns_request->ar_name = req->str;
+         dns_request->ar_service = req->str + hostlen + 1;
+         dns_request->ar_request = &req->hints;
+         dns_request->ar_result = NULL;
+         memset (&req->hints, 0, sizeof req->hints);
+         req->hints.ai_family = family;
+         req->hints.ai_socktype = socktype;
+         strcpy (req->str, SSDATA (host));
+         strcpy (req->str + hostlen + 1, portstring);
+
+         int ret = getaddrinfo_a (GAI_NOWAIT, &dns_request, 1, NULL);
+         if (ret)
+           error ("%s/%s getaddrinfo_a error %d",
+                  SSDATA (host), portstring, ret);
+
+         goto open_socket;
+       }
 #endif /* HAVE_GETADDRINFO_A */
+    }
 
   /* If we have a host, use getaddrinfo to resolve both host and service.
      Otherwise, use getservbyname to lookup the service.  */