[3/6] widl: Avoid generating negative offsets for conformant arrays.

[Dmitry Timoshkov]

This matches midl output and avoids crashes in the string array tests
under Windows. It appears that 32-bit rpcrt4 doesn't support negative
offsets in the array descriptions and crashes in the unmarshalling phase,
while 64-bit rpcrt4 handles negative offsets just fine in all cases.
I decided to generate same output for both 32-bit and 64-bit code and
follow what midl does in this case.
---
 tools/widl/typegen.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/tools/widl/typegen.c b/tools/widl/typegen.c
index 881f161..e05886b 100644
--- a/tools/widl/typegen.c
+++ b/tools/widl/typegen.c
@@ -3581,12 +3581,23 @@ static unsigned int write_type_tfs(FILE *file, int indent,
     case TGT_POINTER:
     {
         enum type_context ref_context;
+        type_t *ref = type_pointer_get_ref(type);
+
         if (context == TYPE_CONTEXT_TOPLEVELPARAM)
             ref_context = TYPE_CONTEXT_PARAM;
         else if (context == TYPE_CONTEXT_CONTAINER_NO_POINTERS)
             ref_context = TYPE_CONTEXT_CONTAINER;
         else
             ref_context = context;
+
+        if (is_conformant_array(ref))
+        {
+            if (context != TYPE_CONTEXT_CONTAINER_NO_POINTERS)
+                write_pointer_tfs(file, attrs, type, *typeformat_offset + 4, context, typeformat_offset);
+
+            return write_type_tfs(file, indent, attrs, ref, name, ref_context, typeformat_offset);
+        }
+
         offset = write_type_tfs( file, indent, attrs, type_pointer_get_ref(type), name,
                                  ref_context, typeformat_offset);
         if (context == TYPE_CONTEXT_CONTAINER_NO_POINTERS)
-- 
1.9.1