Fix limits.h inclusion for cygwin
diff --git a/src/tramp.c b/src/tramp.c
index 19707fb..9cec81e 100644
--- a/src/tramp.c
+++ b/src/tramp.c
@@ -52,7 +52,7 @@
#include <linux/types.h>
#endif
#ifdef __CYGWIN__
-#include <linux/limits.h>
+#include <limits.h>
#endif
#endif