fix void return in cached and added parameters for exact_xmg_resynthesis

[shubhamrai26]

Fix for void to bool return for cached exact_xmg_resynthesis.

[coveralls]

Pull Request Test Coverage Report for Build 635783043

• 5 of 5 (100.0%) changed or added relevant lines in 2 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.004%) to 80.059%

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Totals
Change from base Build 631704657:	0.004%
Covered Lines:	10671
Relevant Lines:	13329

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💛 - Coveralls

[hriener]

Thanks!