fixup! C++: Add tests with missing flow sources.

Author: MathiasVP

cpp/ql/test/library-tests/dataflow/external-models/windows.cpp

@@ -786,13 +786,34 @@ typedef struct _HTTP_REQUEST_HEADERS {
   HTTP_KNOWN_HEADER    KnownHeaders[41];
 } HTTP_REQUEST_HEADERS, *PHTTP_REQUEST_HEADERS;
 
+typedef struct _HTTP_BYTE_RANGE {
+  ULONGLONG StartingOffset;
+  ULONGLONG Length;
+} HTTP_BYTE_RANGE, *PHTTP_BYTE_RANGE;
+
 typedef struct _HTTP_DATA_CHUNK {
   int DataChunkType;
   union {
     struct {
       PVOID pBuffer;
       ULONG BufferLength;
     } FromMemory;
+    struct {
+      HTTP_BYTE_RANGE ByteRange;
+      HANDLE          FileHandle;
+    } FromFileHandle;
+    struct {
+      USHORT FragmentNameLength;
+      PCWSTR pFragmentName;
+    } FromFragmentCache;
+    struct {
+      HTTP_BYTE_RANGE ByteRange;
+      PCWSTR          pFragmentName;
+    } FromFragmentCacheEx;
+    struct {
+      USHORT               TrailerCount;
+      PHTTP_UNKNOWN_HEADER pTrailers;
+    } Trailers;
   };
 } HTTP_DATA_CHUNK, *PHTTP_DATA_CHUNK;