#68 Fix stack corruption in ODBC file I/O

[Shai Aviv]

During my testing of the ODBC file I/O handler, I discovered an issue with one of the SQLBindCol function calls. The int ind variable is 4 bytes, whereas SQLLEN is 8 bytes on a 64-bit machine. Passing (SQLPOINTER)&ind to the function corrupted the SQLHSTMT stmtHndl stack variable, which caused the COBOL program to crash with a SIGSEGV error.