GUACAMOLE-2018: Convert layer to canvas during exportState() only if layer is non-empty. #1050
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A
<canvas>cannot have a width or height of zero. We do have a check for this, but we're actually still callingtoCanvas()regardless of that check, breaking playback of session recordings depending on the content of the recording.This change corrects this by moving the call to
toCanvas()such that it only occurs if the layer has non-zero width and height.