Added to condition to avoid null objects

[bashleigh]

This is a quick fix for #69. However I feel like there should be a decision made as to how we're going to avoid unwanted methods being added the the helper function array #72

#64 Also related to this.

[coveralls]

Pull Request Test Coverage Report for Build 187

• 2 of 2 (100.0%) changed or added relevant lines in 2 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.05%) to 97.0%

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Totals
Change from base Build 178:	0.05%
Covered Lines:	145
Relevant Lines:	145

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💛 - Coveralls

[shekohex]

That's OK, but imo it's not a solution, i think i would open another pr to try to validate null at Compile Time. BTW, good job