Fix: Dereference of null pointer in FDialog

doc/TODO

@@ -20,8 +20,6 @@ Missing Features
      └──► tmp
 ---------------------------------------
 
-- FDialog title button [▲] and [▼] should maximized or restore 
-  the window size on a resizeable dialog
 - A possibility to change the window size dynamically with the mouse
 - Add a scrolling area with on-demand scroll bars for FButtonGroup
 - Adding for flexible layouts a FGrid widget container that organizes 

src/fapp.cpp

@@ -1686,7 +1686,7 @@ int FApplication::processTimerEvent()
 //----------------------------------------------------------------------
 void FApplication::processTerminalUpdate()
 {
-#define MAX_SKIP 8
+  const int max_skip = 8;
 
   if ( terminal_update_pending )
   {
@@ -1696,7 +1696,7 @@ void FApplication::processTerminalUpdate()
       terminal_update_pending = false;
       skipped_terminal_update = 0;
     }
-    else if ( skipped_terminal_update > MAX_SKIP )
+    else if ( skipped_terminal_update > max_skip )
     {
       force_terminal_update = true;
       updateTerminal();
@@ -1707,8 +1707,6 @@ void FApplication::processTerminalUpdate()
     else
       skipped_terminal_update++;
   }
-
-#undef MAX_SKIP
 }
 
 //----------------------------------------------------------------------

src/fdialog.cpp

@@ -233,7 +233,7 @@ void FDialog::drawTitleBar()
   // draw the title button
   gotoxy (xpos+xmin-1, ypos+ymin-1);
 
-  if ( dialog_menu->isVisible() )
+  if ( dialog_menu && dialog_menu->isVisible() )
     setColor (wc.titlebar_button_focus_fg, wc.titlebar_button_focus_bg);
   else
     setColor (wc.titlebar_button_fg, wc.titlebar_button_bg);