#547 All pasted text is leaked - SDL_GetClipboardText() result should be SDL_free'd

[Joseph Pecoraro]

at: c5fa88692bd9aae9ac3c275051ada9251b17b62b

Pasting text into ezquake leaks the string every time. Allocation backtrace in OS X:

shell> MallocStackLogging=1 ./ezquake-darwin &

Paste text into EZQuake

shell> leaks ezquake-darwin

...

Leak: 0x7f8e81d9fad0 size=16 zone: DefaultMallocZone_0x105628000 "TextPasted"
Call stack: [thread 0x7fff79ffb310]:
| start
| main sys_posix.c:319
| Host_Frame host.c:436
| CL_Frame cl_main.c:2433
| Sys_SendKeyEvents vid_sdl2.c:209
| IN_Frame vid_sdl2.c:323
| Key_EventEx keys.c:2154
| Key_Console keys.c:1244
| Sys_GetClipboardTextW sys_sdl2.c:38
| Cocoa_GetClipboardText
| strdup
| malloc
| malloc_zone_malloc

...

Looks like SDL_GetClipboardText() needs to be SDL_free'd.

In fact, str2wcs returns a pointer to a local array. That isn't safe at all =(.