Add/correct a couple of optional attributes (#2252)

* Add missing optional attribute to pFaultCount

To bring it in line with other dual-use count parameters

* Correct optional attribute on VkLatencySurfaceCapabilitiesNV::presentModeCount

This brings it in line with other counter members, such as the one in VkSurfacePresentModeCompatibilityEXT

* remove extraneous space after attribute name

xml/vk.xml

@@ -8776,7 +8776,7 @@ typedef void* <name>MTLSharedEvent_id</name>;
  <type category="struct" name="VkLatencySurfaceCapabilitiesNV" structextends="VkSurfaceCapabilities2KHR">
  <member values="VK_STRUCTURE_TYPE_LATENCY_SURFACE_CAPABILITIES_NV"><type>VkStructureType</type> <name>sType</name></member>
  <member optional="true">const <type>void</type>* <name>pNext</name></member>
- <member optional="false,true"><type>uint32_t</type> <name>presentModeCount</name></member>
+ <member optional="true"><type>uint32_t</type>  <name>presentModeCount</name></member>
  <member optional="true" len="presentModeCount"><type>VkPresentModeKHR</type>* <name>pPresentModes</name></member>
  </type>
  </types>
@@ -13748,7 +13748,7 @@ typedef void* <name>MTLSharedEvent_id</name>;
  <param><type>VkDevice</type> <name>device</name></param>
  <param><type>VkFaultQueryBehavior</type> <name>faultQueryBehavior</name></param>
  <param><type>VkBool32</type>* <name>pUnrecordedFaults</name></param>
- <param><type>uint32_t</type>* <name>pFaultCount</name></param>
+ <param optional="false,true"><type>uint32_t</type>* <name>pFaultCount</name></param>
  <param optional="true" len="pFaultCount"><type>VkFaultData</type>* <name>pFaults</name></param>
  </command>
  <command successcodes="VK_SUCCESS,VK_INCOMPLETE" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY">
@@ -22683,8 +22683,8 @@ typedef void* <name>MTLSharedEvent_id</name>;
  <command name="vkCmdBindIndexBuffer2KHR"/>
  <command name="vkGetRenderingAreaGranularityKHR"/>
  <type name="VkRenderingAreaInfoKHR"/>
- <command name ="vkGetDeviceImageSubresourceLayoutKHR"/>
- <command name ="vkGetImageSubresourceLayout2KHR"/>
+ <command name="vkGetDeviceImageSubresourceLayoutKHR"/>
+ <command name="vkGetImageSubresourceLayout2KHR"/>
  <type name="VkDeviceImageSubresourceInfoKHR"/>
  <type name="VkImageSubresource2KHR"/>
  <type name="VkSubresourceLayout2KHR"/>