Varun Gupta 2061e00c20 MDEV-14440: Assertion `inited==RND' failed in handler::ha_rnd_end ...

In the function QUICK_RANGE_SELECT::init_ror_merged_scan we create a seperate handler if the handler in
head->file cannot be reused. The flag free_file tells us if we have a seperate handler or not.
There are cases where you might create a handler and then there might be a failure(running ALTER)
and then we have to revert the handler back to the original one. The code does that
but it does not reset the flag 'free_file' in this case.
Also backported f2c418079d.

2019-01-18 23:36:47 +05:30

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