Win32: Get 32-bit Windows build working
Also includes changes to allow simultaneous 32-bit and 64-bit Windows builds.
diff --git a/tests/layer_validation_tests.cpp b/tests/layer_validation_tests.cpp
index 9598643..fa72840 100644
--- a/tests/layer_validation_tests.cpp
+++ b/tests/layer_validation_tests.cpp
@@ -207,7 +207,7 @@
     VkBool32                   m_msgFound;
 };
 
-static VkBool32 myDbgFunc(
+static VKAPI_ATTR VkBool32 VKAPI_CALL myDbgFunc(
     VkFlags                    msgFlags,
     VkDebugReportObjectTypeEXT            objType,
     uint64_t                   srcObject,