Fixed out of range error when buffer is empty #1174

Job	Run time
Build for macOS Xcode using Metal	2m 25s
Build for macOS using OpenGL	2m 0s
Build for Ubuntu (GLFW) using OpenGL	3m 6s
Build for Windows using DirectX	11m 56s
Build for macOS using Metal	1m 29s
Build for Web (Emscripten) using WebGL 2	8m 26s
Build for iOS Xcode using Metal	5m 2s
Build for Windows using OpenGL	10m 13s
Build for Ubuntu using OpenGL	2m 59s
	47m 36s

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