98 search on map is broken

[alexkcode]

Description

Adds a check to map search to make sure that lat long coordinates exist before doing the proximity calculation for the map building search feature.

Fixes #98

Testing Instructions

Checked a couple cases in the frontend, including Willis Tower (which was shown in the original issue). Should currently show all the buildings within the correct proximity of the filtered building.

Checklist:

• [ ] My code follows the style guidelines of this project
• [x] I have performed a self-review of my own code
• [x] I have commented my code, particularly in hard-to-understand areas
• [ ] I have added tests that prove my fix is effective or that my feature works
• [ ] New and existing unit tests pass locally with my changes

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[vkoves]

@alexkcode - I'm a little confused, I pulled your branch and still saw the issue, went to the map page and searched for the Willis Tower:

[alexkcode]

Crap made a stupid mistake. I think it should be fixed now but not entirely sure if what I'm what I'm doing is not an anti-pattern. Essentially I changed it so I'm just intermittently checking for NaN.

[alexkcode]

@vkoves please re-review when you get a chance!