Clear clipping rectangle before each hook call

Prevents Lua from being able to make a mess.

src/d_main.cpp

@@ -371,6 +371,9 @@ static bool D_Display(void)
 	if (dedicated) //bail out after wipe logic
 		return false;
 
+	// Catch runaway clipping rectangles.
+	V_ClearClipRect();
+
 	// do buffered drawing
 	switch (gamestate)
 	{

src/lua_hooklib.c

@@ -27,6 +27,8 @@
 #include "d_netcmd.h" // for cv_perfstats
 #include "i_system.h" // I_GetPreciseTime
 
+#include "v_video.h" // V_ClearClipRect
+
 /* =========================================================================
                                   ABSTRACTION
    ========================================================================= */
@@ -672,8 +674,13 @@ void LUA_HookHUD(huddrawlist_h list, int hook_type)
 		hud_interpcounter = 0;
 
 		hud_running = true; // local hook
+
+		// Catch runaway clipping rectangles.
+		V_ClearClipRect();
+
 		init_hook_call(&hook, 0, res_none);
 		call_mapped_hud(&hook, map);
+
 		hud_running = false;
 	}
 }