Fix IndexOutOfBounds exception in Nearby

[misaochan]

Prevents IndexOutOfBounds crash in #1329 . Adds a check for the size of the places array to ensure that we only get() from it if the array is not empty.

Tested on API 25 Nexus S. Unfortunately the error seems to be random and not easily reproducible (so I don't know if it was fixed), however the changes have no adverse effects at least.

[codecov-io]

Codecov Report

Merging #1385 into 2.7.x-release will decrease coverage by <.01%.
The diff coverage is 0%.

@@               Coverage Diff                @@
##           2.7.x-release   #1385      +/-   ##
================================================
- Coverage           3.33%   3.33%   -0.01%     
================================================
  Files                128     128              
  Lines               6769    6771       +2     
  Branches             656     657       +1     
================================================
  Hits                 226     226              
- Misses              6528    6530       +2     
  Partials              15      15

Impacted Files	Coverage Δ
...a/fr/free/nrw/commons/nearby/NearbyController.java	0% <0%> (ø)	⬆️

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[neslihanturan]

Exactly same thing what I was planning, I am either not sure if it fixes the bug. But it should. Thanks @misaochan