[#1407] Add a scenario to pick_up action

For pick up action,
When there is no call selected, the default action is a new call

sflphone-client-gnome/src/actions.c

@@ -294,7 +294,7 @@ sflphone_hang_up()
     void
 sflphone_pick_up()
 {
-
+    printf("sflphone_pick_up\n");
     call_t * selectedCall = calltab_get_selected_call(active_calltree);
     if(selectedCall)
     {
@@ -328,6 +328,10 @@ sflphone_pick_up()
                 break;
         }
     }
+    else {
+        sflphone_new_call();
+    }
+    
 }
 
     void
@@ -536,6 +540,8 @@ sflphone_new_call()
     call_t *c;
     gchar *from, *to;
 
+
+    printf("sflphone_new_call\n");
     sflphone_on_hold();
 
     // Play a tone when creating a new call