Fixed unnecessary global namespace polution in the error handler

src/scripts/boot.lua

@@ -816,6 +816,7 @@ function love.errhand(msg)
 
 	draw()
 
+	local e, a, b, c
 	while true do
 		e, a, b, c = love.event.wait()
 

src/scripts/boot.lua.h

@@ -1197,44 +1197,45 @@ const unsigned char boot_lua[] =
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 };
 // [/boot.lua]