GEventLoop: Don't call process_unprocessed_messages() from itself.

This could be tail-call-optimized but it's not, so we end up overflowing the
stack space if we recurse too many times. This was causing crashes when
resizing Minesweeper.

LibGUI/GEventLoop.cpp

@@ -316,9 +316,6 @@ void GEventLoop::process_unprocessed_bundles()
     if (coalesced_resizes)
         dbgprintf("Coalesced %d resizes\n", coalesced_resizes);
 #endif
-
-    if (!m_unprocessed_bundles.is_empty())
-        process_unprocessed_bundles();
 }
 
 bool GEventLoop::drain_messages_from_server()

LibGUI/GEventLoop.h

@@ -43,6 +43,7 @@ private:
 
     virtual void do_processing() override
     {
+        while (!m_unprocessed_bundles.is_empty())
             process_unprocessed_bundles();
     }