[PATCH 1/6] winevulkan: Don't add alias structs to struct-extensions list

[Liam Middlebrook]

This resolves compilation errors relating to duplicate case values for
alias structures when building against spec version 1.1.106. An example
of one of these errors has been included below:
    vulkan_thunks.c: In function ‘convert_VkDeviceCreateInfo_struct_chain’:
    vulkan_thunks.c:1997:9: error: duplicate case value
             case VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_VARIABLE_POINTERS_FEATURES:
             ^~~~
    vulkan_thunks.c:1377:9: note: previously used here
             case VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_VARIABLE_POINTERS_FEATURES:
         ^~~~

Signed-off-by: Liam Middlebrook 
Reviewed-by: Daniel Koch 
---
 dlls/winevulkan/make_vulkan | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/dlls/winevulkan/make_vulkan b/dlls/winevulkan/make_vulkan
index 4f1c03cc7c..058c5e41e9 100755
--- a/dlls/winevulkan/make_vulkan
+++ b/dlls/winevulkan/make_vulkan
@@ -2955,6 +2955,13 @@ class VkRegistry(object):
         for struct in structs:
             struct.set_type_info(self.types)

+            # Alias structures have enum values equivalent to those of the
+            # structure which they are aliased against. we need to ignore alias
+            # structs when populating the struct extensions list, otherwise we
+            # will create duplicate case entries.
+            if struct.alias:
+                continue
+
             for structextend in struct.structextends:
                 s = self.types[structextend]["data"]
                 s.struct_extensions.append(struct)
--
2.17.1