Don't use existance of renderpass to determine graphics vs compute pipe

* When using dynamic rendering there is no renderpass object even for graphics
  pipelines

renderdoc/driver/vulkan/vk_info.cpp

@@ -356,6 +356,8 @@ void VulkanCreationInfo::Pipeline::Init(VulkanResourceManager *resourceMan,
 {
   flags = pCreateInfo->flags;
 
+  graphicsPipe = true;
+
   layout = GetResID(pCreateInfo->layout);
   renderpass = GetResID(pCreateInfo->renderPass);
   subpass = pCreateInfo->subpass;
@@ -741,6 +743,8 @@ void VulkanCreationInfo::Pipeline::Init(VulkanResourceManager *resourceMan, Vulk
 {
   flags = pCreateInfo->flags;
 
+  graphicsPipe = false;
+
   layout = GetResID(pCreateInfo->layout);
 
   // need to figure out which states are valid to be NULL

renderdoc/driver/vulkan/vk_info.h

@@ -252,6 +252,8 @@ struct VulkanCreationInfo
     void Init(VulkanResourceManager *resourceMan, VulkanCreationInfo &info, ResourceId id,
               const VkComputePipelineCreateInfo *pCreateInfo);
 
+    bool graphicsPipe = false;
+
     ResourceId layout;
     ResourceId renderpass;
     uint32_t subpass;

renderdoc/driver/vulkan/vk_replay.cpp

@@ -4253,7 +4253,8 @@ void VulkanReplay::RefreshDerivedReplacements()
     {
       VkPipeline pipe = VK_NULL_HANDLE;
 
-      if(pipeInfo.renderpass != ResourceId())    // check if this is a graphics or compute pipeline
+      // check if this is a graphics or compute pipeline
+      if(pipeInfo.graphicsPipe)
       {
         VkGraphicsPipelineCreateInfo pipeCreateInfo;
         m_pDriver->GetShaderCache()->MakeGraphicsPipelineInfo(pipeCreateInfo, it->first);