Executing prepared statements is succesfull only for the first two statements
The reworked patch descends to the bug #69526 which is fixed by
this as well. The broken logic in the current code was, that
SQLDescribeParam was executed in odbc_execute every time. This piece
is now moved into odbc_prepare and the results are carried on in an
additional structure.
Since the ext/odbc headers are not being currently installed and the
corresponding structs like odbc_result are not used outside ext/odbc,
the binary compatibility persists. Executing SQLDescribeParam only once
in odbc_prepare is also an optimization as the filds usually won't
change that fast and thus requestind the descriptions on every
execution is not required.
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