Merge commit '4c61b7d3c3eb8d474ab54a2221eeb1a059dcd67d' into libraw-copylib

Upgrade LibRaw to snapshot 202403.

rtengine/libraw/internal/libraw_checked_buffer.h

@@ -0,0 +1,28 @@
+#pragma once
+
+#include <vector>
+#include "../libraw/libraw_types.h"
+
+class checked_buffer_t
+{
+public:
+  // create with internal storage
+	checked_buffer_t(short ord, int size);
+	checked_buffer_t(short ord, unsigned char *dd, int ss);
+	ushort sget2(int offset);
+	void checkoffset(int off);
+	unsigned char operator[](int idx);
+	unsigned sget4(int offset);
+	double sgetreal(int type, int offset);
+    unsigned char *data() { return _data; }
+ 
+	int tiff_sget(unsigned save, INT64 *tag_offset, unsigned *tag_id, unsigned *tag_type, INT64 *tag_dataoffset,
+		unsigned *tag_datalen, int *tag_dataunitlen);
+protected:
+  short _order;
+
+ private:
+  unsigned char *_data;
+  int _len;
+  std::vector<unsigned char> storage;
+};