Improve 01526 message when sampleLocationsPerPixel is 0

[ziga-lunarg]

If VkSampleLocationsInfoEXT::sampleLocationsPerPixel is 0, the validation layers message will say Unhandled VkSampleCountFlagBits

Full message is:

vkCmdSetSampleLocationsEXT(): pSampleLocationsInfo->sampleLocationsPerPixel is Unhandled VkSampleCountFlagBits, but VkPhysicalDeviceSampleLocationsPropertiesEXT::sampleLocationSampleCounts is VK_SAMPLE_COUNT_1_BIT|VK_SAMPLE_COUNT_2_BIT|VK_SAMPLE_COUNT_4_BIT|VK_SAMPLE_COUNT_8_BIT|VK_SAMPLE_COUNT_16_BIT.

[spencer-lunarg]

so zero is not a valid VkSampleCountFlagBits so what would you prefer?

pSampleLocationsInfo->sampleLocationsPerPixel is Unhandled VkSampleCountFlagBits (0x0bad), but

[ziga-lunarg]

Yes, I would prefer to see the invalid value, rather than Unhandled VkSampleCountFlagBits.

[spencer-lunarg]

ok, that is fair, will get a fix up soon-ish

[spencer-lunarg]

so this is something we need to fix in VUL then, vk_enum_string_helper.h has string_VkSampleCountFlagBits which is printing Unhandled VkSampleCountFlagBits and would need to where we would print the value when using an Unhandled value