vktrace_generate.py: fix vkCreateShader tracing

sizeof(VkShaderCreateInfo), not sizeof(VkShaderModuleCreateInfo).
diff --git a/vktrace/vktrace_generate.py b/vktrace/vktrace_generate.py
index 729f951..9372793 100755
--- a/vktrace/vktrace_generate.py
+++ b/vktrace/vktrace_generate.py
@@ -239,7 +239,7 @@
                                                                         '    vktrace_add_buffer_to_trace_packet(pHeader, (void**)&(pPacket->pCreateInfo->pCode), pPacket->pCreateInfo->codeSize, pCreateInfo->pCode)',
                                                         'finalize_txt': 'vktrace_finalize_buffer_address(pHeader, (void**)&(pPacket->pCreateInfo->pCode));\n'
                                                                         '    vktrace_finalize_buffer_address(pHeader, (void**)&(pPacket->pCreateInfo))'},
-                           'VkShaderCreateInfo': {'add_txt':    'vktrace_add_buffer_to_trace_packet(pHeader, (void**)&(pPacket->pCreateInfo), sizeof(VkShaderModuleCreateInfo), pCreateInfo);\n'
+                           'VkShaderCreateInfo': {'add_txt':    'vktrace_add_buffer_to_trace_packet(pHeader, (void**)&(pPacket->pCreateInfo), sizeof(VkShaderCreateInfo), pCreateInfo);\n'
                                                                 '    vktrace_add_buffer_to_trace_packet(pHeader, (void**)&(pPacket->pCreateInfo->pName), strlen(pPacket->pCreateInfo->pName), pCreateInfo->pName)',
                                                                 'finalize_txt': 'vktrace_finalize_buffer_address(pHeader, (void**)&(pPacket->pCreateInfo->pName));\n'
                                                                 '    vktrace_finalize_buffer_address(pHeader, (void**)&(pPacket->pCreateInfo))'},