Unifying the default folder for screenshots and making it configurable

For all operating systems screenshots are now saved in ~/Desktop.
If this folder does not exist, then the user's home is used.
The players can change this with the new option --screenshot-dir.
This patch is for http://mantis.themanaworld.org/view.php?id=969

1 files changed, 2 insertions, 0 deletions

diff --git a/src/game.h b/src/game.h
index 628c710b..1293db98 100644
--- a/src/game.h
+++ b/src/game.h
@@ -66,4 +66,6 @@ class Game : public ConfigListener
  */
 int get_elapsed_time(int start_time);
 
+void setScreenshotDir(const std::string &dir);
+
 #endif