Vulkan: Silence some warnings.

qt/src/EmuMainWindow.cpp

@@ -660,6 +660,7 @@ void EmuMainWindow::pauseContinue()
     {
         manual_pause = true;
         app->pause();
+        canvas->paintEvent(nullptr);
     }
 }
 

vulkan/vk_mem_alloc_implementation.cpp

@@ -1,2 +1,4 @@
 #define VMA_IMPLEMENTATION
+#define VMA_NULLABLE
+#define VMA_NOT_NULL
 #include "vulkan_context.hpp"

vulkan/vulkan_hpp_wrapper.hpp

@@ -1,4 +1,5 @@
 #ifndef NOMINMAX
 #define NOMINMAX
 #endif
+#define VULKAN_HPP_ASSERT(x)
 #include "vulkan/vulkan.hpp"