Fix stack corruption in httpd

modules/control/http/http.c

@@ -124,7 +124,7 @@ static int Open( vlc_object_t *p_this )
                   *psz_crl = NULL;
     int           i_port       = 0;
     char          *psz_src;
-    char          psz_tmp[10];
+    char          *psz_tmp;
 
     var_Create(p_intf->p_libvlc_global, "http-host", VLC_VAR_STRING );
     psz_address=var_GetString(p_intf->p_libvlc_global, "http-host");
@@ -263,9 +263,14 @@ static int Open( vlc_object_t *p_this )
             i_port= 8080;
     }
 
+    /* maximum port is 65535 , strlen("65535") == 5 */
+    psz_tmp = malloc( ( strlen( psz_address ) + 5 ) * sizeof( char) );
+
     /* Ugly hack to allow to run several HTTP servers on different ports. */
+
     sprintf( psz_tmp, "%s:%d", psz_address, i_port + 1 );
     var_SetString( p_intf->p_libvlc_global, "http-host", psz_tmp );
+    free( psz_tmp );
 
     msg_Dbg( p_intf, "base %s:%d", psz_address, i_port );