dev/core#772 fix php7.2 warnings on import

[eileenmcnaughton]

Overview

Fixed a notice when importing with php 7.2

This is replicable if you have an import file with the column 'Contact Source' among others & import setting it to
use 'Column Headers'. It correctly maps contact source & sets it as a default.

Before

After

No notice

Technical Details

The code in setValue
is open to either a string or an array but it uses count() in it's initial check - which was OK back when it was written

• nowadays count on a string puts out an error (but still returns 1) as per originally

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[eileenmcnaughton]

test this please

[jitendrapurohit]

I was able to replicate this and confirm that the patch fixes the error. The "before" notice screen looks like below on contribution import -

After - No error on import screen.

[eileenmcnaughton]

thanks @jitendrapurohit