input.lua: only reset cursor if this input set it

Each input that was not being moused over was basically trying to reset
the special cursor if it was set (like a text selection I cursor). This
will be a problem in the upcoming special roomnames editor because
something else wants to display a special cursor with inputs onscreen,
so now the inputs will only reset the special cursor if they themselves
set it first (and they will only set it once and not repeatedly).

[pre11]

Author: Daaaav

Source/input.lua

@@ -104,6 +104,7 @@ local input = {
 	newlinechars = {},
 
 	areas = {},
+	ibeam_set = {}
 }; newinputsys = input
 
 inputs = {}
@@ -206,6 +207,7 @@ function input.close(id, updatemappings)
 	input.newlinechars[id] = nil
 
 	input.areas[id] = nil
+	input.ibeam_set[id] = false
 
 	local thestate = input.stateof[id]
 	input.stateof[id] = nil
@@ -376,14 +378,18 @@ function input.drawcas(id, x, y, font, cjk_align, sx, sy, lineh)
 	end
 
 	if mouseoninput and not RCMactive then
-		love.mouse.setCursor(text_cursor)
-		special_cursor = true
+		if not input.ibeam_set[id] then
+			love.mouse.setCursor(text_cursor)
+			special_cursor = true
+			input.ibeam_set[id] = true
+		end
 
 		if (love.mouse.isDown("l") or love.mouse.isDown("r")) and not input.ignoremousepressed then
 			input.mousepressed(id, x, y, font, cjk_align, sx, sy, lineh)
 		end
-	else
+	elseif input.ibeam_set[id] then
 		reset_special_cursor()
+		input.ibeam_set[id] = false
 	end
 
 	-- Selection