pad in order to synthesize photometry of z>5.53 redshift targets

[moustakas]

Two-line fix to the only crash encountered while fitting all 1.3M Fuji targets.

[coveralls]

Pull Request Test Coverage Report for Build 4211349207

• 3 of 3 (100.0%) changed or added relevant lines in 2 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.01%) to 53.447%

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Totals
Change from base Build 4207668150:	0.01%
Covered Lines:	2202
Relevant Lines:	4120

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💛 - Coveralls