g-socket.ads, [...] (Get_Address): Make Stream a "not null" parameter.

gcc/ada/
	* g-socket.ads, g-socket.adb (Get_Address): Make Stream a
	"not null" parameter.

From-SVN: r134386

gcc/ada/ChangeLog

@@ -1,3 +1,8 @@
+2008-04-17  Samuel Tardieu  <sam@rfc1149.net>
+
+	* g-socket.ads, g-socket.adb (Get_Address): Make Stream a
+	"not null" parameter.
+
 2008-04-17  Samuel Tardieu  <sam@rfc1149.net>
 
 	* g-socket.adb: Add a message "IPv6 not supported" to the

gcc/ada/g-socket.adb

@@ -763,11 +763,11 @@ package body GNAT.Sockets is
    -- Get_Address --
    -----------------
 
-   function Get_Address (Stream : Stream_Access) return Sock_Addr_Type is
+   function Get_Address
+     (Stream : not null Stream_Access) return Sock_Addr_Type
+   is
    begin
-      if Stream = null then
-         raise Socket_Error;
-      elsif Stream.all in Datagram_Socket_Stream_Type then
+      if Stream.all in Datagram_Socket_Stream_Type then
          return Datagram_Socket_Stream_Type (Stream.all).From;
       else
          return Get_Peer_Name (Stream_Socket_Stream_Type (Stream.all).Socket);

gcc/ada/g-socket.ads

@@ -900,7 +900,8 @@ package GNAT.Sockets is
    --  Create a stream associated with a datagram-based socket that is already
    --  bound. Send_To is the socket address to which messages are being sent.
 
-   function Get_Address (Stream : Stream_Access) return Sock_Addr_Type;
+   function Get_Address
+     (Stream : not null Stream_Access) return Sock_Addr_Type;
    --  Return the socket address from which the last message was received
 
    procedure Free is new Ada.Unchecked_Deallocation