darwin: Avoid possibly undefined version macro in configure.ac

References #1056

Signed-off-by: Tormod Volden <debian.tormod@gmail.com>
diff --git a/configure.ac b/configure.ac
index 7dd7dd4..97712d9 100644
--- a/configure.ac
+++ b/configure.ac
@@ -208,7 +208,7 @@
 		AC_MSG_CHECKING([whether OS X target version is 10.12 or later])
 		AC_COMPILE_IFELSE([AC_LANG_PROGRAM([
 				#include <AvailabilityMacros.h>
-				#if MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_12
+				#if MAC_OS_X_VERSION_MIN_REQUIRED < 101200
 				# error "Target OS X version is too old"
 				#endif
 			], [])],
diff --git a/libusb/version_nano.h b/libusb/version_nano.h
index 014b2ef..2819c18 100644
--- a/libusb/version_nano.h
+++ b/libusb/version_nano.h
@@ -1 +1 @@
-#define LIBUSB_NANO 11699
+#define LIBUSB_NANO 11700