Attempt to fix OSX build

atari800/src/cartridge.c

@@ -28,6 +28,7 @@
 #include <string.h>
 
 #include "atari.h"
+#include "crc32.h"
 #include "binload.h" /* BINLOAD_loading_basic */
 #include "cartridge.h"
 #include "memory.h"

atari800/src/util.h

@@ -12,6 +12,9 @@
 #ifdef HAVE_UNISTD_H
 #include <unistd.h>
 #endif
+#ifdef HAVE_STRINGS_H
+#include <strings.h>
+#endif
 
 /* String functions ------------------------------------------------------ */