Merge branch 'VulkanLightBugFix' into 'master'

BUG: fixed comnpile bug with Vulkan renderer due to changes in the light class

See merge request !294

Source/Rendering/VulkanRenderer/imstkVulkanRenderer.cpp

@@ -1621,7 +1621,7 @@ VulkanRenderer::updateGlobalUniforms(uint32_t frameIndex)
         {
             // Only supports directional lights right now
             auto focalPoint = lights[i]->getFocalPoint();
-            auto position = Vec3d(0,0,0);
+            auto position = Vec3f(0,0,0);
             int type = 1;
             int shadowMapIndex = -1;