Add geometry typecast test

[sidorares]

this is a fork of #1428, investigating mysql 5.7 failures

[wellwelwel]

investigating mysql 5.7 failures

@sidorares and @testn, it's because of the SRID 0 in:

CREATE TEMPORARY TABLE geom_test (p POINT SRID 0, g GEOMETRY NOT NULL SRID 0);

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By removing the SRID, it will work:

CREATE TEMPORARY TABLE geom_test (p POINT, g GEOMETRY NOT NULL);

• When we don't specify a SRID, MySQL will assume the points to be 0 by default.

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