[vulkan] fix custom border color query struct

src/video_core/vulkan_common/vulkan_device.cpp

@@ -1064,12 +1064,14 @@ bool Device::GetSuitability(bool requires_swapchain) {
 
     // Query VK_EXT_custom_border_color properties if the extension is enabled.
     if (extensions.custom_border_color) {
-        const auto fp = reinterpret_cast<PFN_vkGetPhysicalDeviceCustomBorderColorPropertiesEXT>(
-            dld.vkGetInstanceProcAddr(instance, "vkGetPhysicalDeviceCustomBorderColorPropertiesEXT"));
-        if (fp != nullptr) {
+        auto proc = dld.vkGetInstanceProcAddr(instance, "vkGetPhysicalDeviceCustomBorderColorPropertiesEXT");
+        if (proc != nullptr) {
+            auto vkGetPhysicalDeviceCustomBorderColorPropertiesEXT =
+                reinterpret_cast<void(*)(VkPhysicalDevice, VkPhysicalDeviceCustomBorderColorPropertiesEXT*)>(
+                    proc);
             custom_border_color_properties.sType = VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_CUSTOM_BORDER_COLOR_PROPERTIES_EXT;
             custom_border_color_properties.pNext = nullptr;
-            fp(physical, &custom_border_color_properties);
+            vkGetPhysicalDeviceCustomBorderColorPropertiesEXT(physical, &custom_border_color_properties);
             has_custom_border_color_properties = true;
         } else {
             has_custom_border_color_properties = false;