[SDL_Tizen] fix svase issue in tizenkeyboard.c

Change-Id: Ica565653a8c0c35c6cca7beaa3092176d547ba88

diff --git a/src/video/tizen/SDL_tizenkeyboard.c b/src/video/tizen/SDL_tizenkeyboard.c
index 6e7f90a..cc55b93 100755 (executable)
--- a/src/video/tizen/SDL_tizenkeyboard.c
+++ b/src/video/tizen/SDL_tizenkeyboard.c
@@ -117,6 +117,10 @@ Tizen_StartTextInput(_THIS)
       Tizen_InitKeyboard(_this);
 
     window = SDL_GetKeyboardFocus();
+    if(!window){
+       SDL_SetError("Keyboard focused window is NULL");
+       return;
+    }
     Tizen_ShowScreenKeyboard(_this, window);
 }