libusb.h: Rename ZERO_SIZED_ARRAY to LIBUSB_FLEXIBLE_ARRAY

This reflects the C99 terminology, instead of the old hack of using a
zero sized array.

Also adds the LIBUSB prefix to avoid namespace colisions, as this is
present in a public header.

References libusb#1409

libusb/libusb.h

@@ -50,9 +50,9 @@ typedef SSIZE_T ssize_t;
 #include <time.h>
 
 #if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)
-#define ZERO_SIZED_ARRAY		/* [] - valid C99 code */
+#define LIBUSB_FLEXIBLE_ARRAY		/* [] - valid C99 code */
 #else
-#define ZERO_SIZED_ARRAY	0	/* [0] - non-standard, but usually working code */
+#define LIBUSB_FLEXIBLE_ARRAY	0	/* [0] - non-standard, but usually working code */
 #endif /* __STDC_VERSION__ */
 
 /* 'interface' might be defined as a macro on Windows, so we need to
@@ -857,7 +857,7 @@ struct libusb_bos_dev_capability_descriptor {
 	uint8_t  bDevCapabilityType;
 
 	/** Device Capability data (bLength - 3 bytes) */
-	uint8_t  dev_capability_data[ZERO_SIZED_ARRAY];
+	uint8_t  dev_capability_data[LIBUSB_FLEXIBLE_ARRAY];
 };
 
 /** \ingroup libusb_desc
@@ -882,7 +882,7 @@ struct libusb_bos_descriptor {
 	uint8_t  bNumDeviceCaps;
 
 	/** bNumDeviceCap Device Capability Descriptors */
-	struct libusb_bos_dev_capability_descriptor *dev_capability[ZERO_SIZED_ARRAY];
+	struct libusb_bos_dev_capability_descriptor *dev_capability[LIBUSB_FLEXIBLE_ARRAY];
 };
 
 /** \ingroup libusb_desc
@@ -1004,7 +1004,7 @@ struct libusb_platform_descriptor {
 	uint8_t  PlatformCapabilityUUID[16];
 
 	/** Capability data (bLength - 20) */
-	uint8_t  CapabilityData[ZERO_SIZED_ARRAY];
+	uint8_t  CapabilityData[LIBUSB_FLEXIBLE_ARRAY];
 };
 
 /** \ingroup libusb_asyncio
@@ -1384,7 +1384,7 @@ struct libusb_transfer {
 	int num_iso_packets;
 
 	/** Isochronous packet descriptors, for isochronous transfers only. */
-	struct libusb_iso_packet_descriptor iso_packet_desc[ZERO_SIZED_ARRAY];
+	struct libusb_iso_packet_descriptor iso_packet_desc[LIBUSB_FLEXIBLE_ARRAY];
 };
 
 /** \ingroup libusb_misc

libusb/libusbi.h

@@ -679,7 +679,7 @@ struct usbi_interface_descriptor {
 struct usbi_string_descriptor {
 	uint8_t  bLength;
 	uint8_t  bDescriptorType;
-	uint16_t wData[ZERO_SIZED_ARRAY];
+	uint16_t wData[LIBUSB_FLEXIBLE_ARRAY];
 } LIBUSB_PACKED;
 
 struct usbi_bos_descriptor {
@@ -893,7 +893,7 @@ static inline void *usbi_get_transfer_priv(struct usbi_transfer *itransfer)
 struct discovered_devs {
 	size_t len;
 	size_t capacity;
-	struct libusb_device *devices[ZERO_SIZED_ARRAY];
+	struct libusb_device *devices[LIBUSB_FLEXIBLE_ARRAY];
 };
 
 struct discovered_devs *discovered_devs_append(

libusb/version_nano.h

@@ -1 +1 @@
-#define LIBUSB_NANO 11857
+#define LIBUSB_NANO 11858