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Issue #101: "RGBA float" to "CIE Lab alpha float" fish with SSE2…

Jehan requested to merge wip/Jehan/Issue-101-consistent-babl_process-SSE2 into master

… codepath give different results than without SSE2.

The slightly different result is expected and the SSE2 code does not seem bugged at all. The problem though is that in a single babl_process, we end up with different results, which may be amplified by further algorithm into surprising renders (cf. gimp#12030). With this commit, we ensure than when using the SSE2 codepath, we do not end processing the last few pixels with different code.

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