More splits from "tuxpaint.c":

+ "debug.h": Defines whether debugging printf() calls should be enabled.
  + "dirwalk.c/h": Callback functions for recursive directory traversal.
  + "fonts.c/h": Font loading/grouping/discarding variables and functions.
  + "get_fname.c/h": Functions for constructing preferred file paths.

src/win32_print.c

@@ -28,6 +28,7 @@
 #include <direct.h>
 #include "SDL_syswm.h"
 #include "win32_print.h"
+#include "debug.h"
 
 
 #define NOREF(x)        ((x)=(x))