Add missing include directories

configure.in

@@ -2274,11 +2274,13 @@ case "$target" in
             else
                 AC_DEFINE(SDL_TIMER_MINT)
                 SOURCES="$SOURCES $srcdir/src/timer/mint/*.c"
+                BUILD_CFLAGS="$BUILD_CFLAGS -I$srcdir/src/timer/mint"
             fi
             have_timers=yes
         fi
         # MiNT does not define "unix"
         BUILD_CFLAGS="$BUILD_CFLAGS -Dunix"
+        BUILD_CFLAGS="$BUILD_CFLAGS -I$srcdir/src/video/ataricommon"
         ;;
     *-riscos)
         ARCH=riscos

src/timer/mint/SDL_systimer.c

@@ -43,7 +43,7 @@
 #include "../SDL_timer_c.h"
 #include "SDL_thread.h"
 
-#include "mint/SDL_vbltimer_s.h"
+#include "SDL_vbltimer_s.h"
 
 /* The first ticks value of the application */
 static Uint32 start;