Fix keyboard input being swallowed due to missing events such as SDL_KEYUP.

This is due to a seemingly undocumented bug and/or feature in SDL, where SDL_EventState and SDL_SetEventFilter mysteriously discard all pending events.

The following SDL code in SDL_EventState and SDL_SetEventFilter discards all pending events, with a comment saying it does so:
    while ( SDL_PollEvent(&bitbucket) > 0 )
        ;
There appears to be no documentation of this fact anywhere outside the comment in the SDL code.

I am not aware of any logical reason why enabling events with SDL_EventState should cause less events to be received than otherwise.

Author: Cyp

lib/framework/frame.c

@@ -35,6 +35,7 @@
 #include "frameint.h"
 #include "frameresource.h"
 #include "input.h"
+#include "lib/widget/scrap.h"
 #include "SDL_framerate.h"
 #include "physfs_ext.h"
 
@@ -260,6 +261,9 @@ bool frameInitialise(
 	/* Initialise the input system */
 	inputInitialise();
 
+	// Initialise clipboard stuff.
+	init_scrap();
+
 	/* Initialise the frame rate stuff */
 	InitFrameStuff();
 

lib/widget/editbox.c

@@ -114,8 +114,6 @@ W_EDITBOX* editBoxCreate(const W_EDBINIT* psInit)
 
 	psWidget->blinkOffset = SDL_GetTicks();
 
-	init_scrap();
-
 	return psWidget;
 }