Resize GameArea after MainFrame initialization

The GameArea was setting incorrect minimum size during initialization
due to the MainFrame not being entirely loaded, this caused the
MainFrame to not be resized properly on initialization. Resetting the
MainFrame minimum size after everything has been loaded fixes the issue.

This also changes MainFrame to ignore events sent before initialization
is complete, which should speed up startup a bit.

Fixes #1186

src/wx/guiinit.cpp

@@ -2813,5 +2813,12 @@ bool MainFrame::BindControls()
     panel->SetFrameTitle();
     // All OK; activate idle loop
     panel->SetExtraStyle(panel->GetExtraStyle() | wxWS_EX_PROCESS_IDLE);
+
+    // Re-adjust size now to nudge some sense into Widgets.
+    panel->AdjustSize(false);
+
+    // Frame initialization is complete.
+    init_complete_ = true;
+
     return true;
 }

src/wx/wxvbam.cpp

@@ -930,6 +930,9 @@ void MainFrame::OnMenu(wxContextMenuEvent& event)
 }
 
 void MainFrame::OnMove(wxMoveEvent&) {
+    if (!init_complete_) {
+        return;
+    }
     if (!IsFullScreen() && !IsMaximized()) {
         const wxPoint window_pos = GetScreenPosition();
         OPTION(kGeomWindowX) = window_pos.x;
@@ -954,6 +957,9 @@ void MainFrame::OnMoveEnd(wxMoveEvent&) {
 void MainFrame::OnSize(wxSizeEvent& event)
 {
     wxFrame::OnSize(event);
+    if (!init_complete_) {
+        return;
+    }
     const wxRect window_rect = GetRect();
     const wxPoint window_pos = GetScreenPosition();
 

src/wx/wxvbam.h

@@ -356,6 +356,9 @@ private:
     JoystickPoller* jpoll = nullptr;
     // quicker & more accurate than FindFocus() != NULL
     bool focused;
+    // One-time toggle to indicate that this object is fully initialized. This
+    // used to filter events that are sent during initialization.
+    bool init_complete_ = false;
 #ifndef NO_LINK
     const config::OptionsObserver gba_link_observer_;
 #endif