vulkan: fix incorrect return type

src/modules/graphics/vulkan/Shader.cpp

@@ -1099,7 +1099,7 @@ void Shader::setMainTex(graphics::Texture *texture)
 	}
 }
 
-VkDescriptorPool Shader::createDescriptorPool()
+void Shader::createDescriptorPool()
 {
 	VkDescriptorPoolCreateInfo createInfo{};
 	createInfo.sType = VK_STRUCTURE_TYPE_DESCRIPTOR_POOL_CREATE_INFO;

src/modules/graphics/vulkan/Shader.h

@@ -98,7 +98,7 @@ private:
 	void createDescriptorPoolSizes();
 	void createStreamBuffers();
 	void buildLocalUniforms(spirv_cross::Compiler &comp, const spirv_cross::SPIRType &type, size_t baseoff, const std::string &basename);
-	VkDescriptorPool createDescriptorPool();
+	void createDescriptorPool();
 	VkDescriptorSet allocateDescriptorSet();
 
 	VkDeviceSize uniformBufferSizeAligned;