Merge pull request #128 from hartmutbehrens/fix/docs

Update quick start docs to reflect that instance is not optional
diff --git a/src/vk_mem_alloc.h b/src/vk_mem_alloc.h
index 640b3d0..ecbb00c 100644
--- a/src/vk_mem_alloc.h
+++ b/src/vk_mem_alloc.h
@@ -146,7 +146,7 @@
 

 At program startup:

 

--# Initialize Vulkan to have `VkPhysicalDevice` and `VkDevice` object.

+-# Initialize Vulkan to have `VkPhysicalDevice`, `VkDevice` and `VkInstance` object.

 -# Fill VmaAllocatorCreateInfo structure and create #VmaAllocator object by

    calling vmaCreateAllocator().

 

@@ -154,6 +154,7 @@
 VmaAllocatorCreateInfo allocatorInfo = {};

 allocatorInfo.physicalDevice = physicalDevice;

 allocatorInfo.device = device;

+allocatorInfo.instance = instance;

 

 VmaAllocator allocator;

 vmaCreateAllocator(&allocatorInfo, &allocator);