catch more sendrecv errors + increase get() timout to 5 minutes

Common/GmshSocket.h

@@ -87,16 +87,18 @@ class GmshSocket{
   // the socket name
   std::string _sockname;
   // send some data over the socket
-  void _SendData(const void *buffer, int bytes)
+  int _SendData(const void *buffer, int bytes)
   {
     const char *buf = (const char *)buffer;
     int sofar = 0;
     int remaining = bytes;
     do {
       int len = send(_sock, buf + sofar, remaining, 0);
+      if(len < 0) return -1; // error
       sofar += len;
       remaining -= len;
     } while(remaining > 0);
+    return bytes;
   }
   // receive some data over the socket
   int _ReceiveData(void *buffer, int bytes)

Common/onelab.h

@@ -743,8 +743,8 @@ namespace onelab{
 	_gmshClient->SendMessage(GmshSocket::GMSH_PARAM_QUERY_ALL, msg.size(), &msg[0]);
 
       while(1){
-        // stop if we have no communications for 10 secs
-        int ret = _gmshClient->Select(10, 0);
+        // stop if we have no communications for 5 minutes
+        int ret = _gmshClient->Select(500, 0);
         if(!ret){
           _gmshClient->Info("Timout: aborting remote get");
           return false;