Fix possible division by zero in edge cases

* Reported by Coverity Scan

qrenderdoc/Widgets/Extended/RDHeaderView.cpp

@@ -364,7 +364,7 @@ void RDHeaderView::cacheSectionMinSizes()
 
 void RDHeaderView::resizeSectionsWithHints()
 {
-  if(m_sectionMinSizes.count() == 0)
+  if(m_sectionMinSizes.count() == 0 || m_sectionStretchHintTotal <= 0)
     return;
 
   QVector<int> sizes = m_sectionMinSizes;

qrenderdoc/Windows/StatisticsViewer.cpp

@@ -758,6 +758,10 @@ void StatisticsViewer::GenerateReport()
     largeTexH /= largeTexCount;
   }
 
+  float drawRatio = 0.0f;
+  if(drawCount + dispatchCount > 0)
+    drawRatio = (float)numAPIcalls / (float)(drawCount + dispatchCount);
+
   const FrameDescription &frameInfo = m_Ctx.FrameInfo();
 
   float compressedMB = (float)frameInfo.compressedFileSize / (1024.0f * 1024.0f);
@@ -776,8 +780,7 @@ void StatisticsViewer::GenerateReport()
           .arg(persistentMB, 2, 'f', 2)
           .arg(initDataMB, 2, 'f', 2);
   QString drawList = tr("Draw calls: %1\nDispatch calls: %2\n").arg(drawCount).arg(dispatchCount);
-  QString ratio = tr("API:Draw/Dispatch call ratio: %1\n\n")
-                      .arg((float)numAPIcalls / (float)(drawCount + dispatchCount));
+  QString ratio = tr("API:Draw/Dispatch call ratio: %1\n\n").arg(drawRatio);
   QString textures = tr("%1 Textures - %2 MB (%3 MB over 32x32), %4 RTs - %5 MB.\n"
                         "Avg. tex dimension: %6x%7 (%8x%9 over 32x32)\n")
                          .arg(numTextures)

renderdoc/driver/d3d12/d3d12_debug.cpp

@@ -3921,6 +3921,12 @@ void D3D12DebugManager::InitPostVSBuffers(uint32_t eventID)
       sodecls.push_back(decl);
     }
 
+    if(stride == 0)
+    {
+      RDCERR("Didn't get valid stride! Setting to 4 bytes");
+      stride = 4;
+    }
+
     // shift position attribute up to first, keeping order otherwise
     // the same
     if(posidx > 0)

renderdoc/driver/vulkan/wrappers/vk_get_funcs.cpp

@@ -165,7 +165,7 @@ void WrappedVulkan::vkGetImageMemoryRequirements(VkDevice device, VkImage image,
   // allow for this. The variability isn't quite clear, but for now we assume aligning size to
   // alignment * 4 should be sufficient (adding on a fixed padding won't help the problem as it
   // won't remove the variability, nor will adding then aligning for the same reason).
-  if(GetDriverVersion().IsAMD())
+  if(GetDriverVersion().IsAMD() && pMemoryRequirements->size > 0)
   {
     VkMemoryRequirements &memreq = *pMemoryRequirements;
 
@@ -247,7 +247,7 @@ void WrappedVulkan::vkGetImageMemoryRequirements2KHR(VkDevice device,
   // allow for this. The variability isn't quite clear, but for now we assume aligning size to
   // alignment * 4 should be sufficient (adding on a fixed padding won't help the problem as it
   // won't remove the variability, nor will adding then aligning for the same reason).
-  if(GetDriverVersion().IsAMD())
+  if(GetDriverVersion().IsAMD() && pMemoryRequirements->memoryRequirements.size > 0)
   {
     VkMemoryRequirements &memreq = pMemoryRequirements->memoryRequirements;