oratcl SvnCode

improve error logging for when ORACLE_LIBRARY points to an invalid location.
correct core dump in error routine when ORACLE_LIBRARY is not NULL.

Add handling for environment variable ORACLE_LIBRARY. ORACLE_LIBRARY should be set to a valid path to the libclntsh.so file, or to the filename itself if the path to the file is in the systems library search path for example: in LD_LIBRARY_PATH on Solaris systems or /etc/ld.so.conf on Linux systems.

This should allow much easier use of precompiled libraries on systems where the oracle install does not follow the normal directory layout.

The ChangeLog provides some sample configurations.

remove some debugging lines

add credit lines to ChangeLog

add missing DecrRefCount in error condition

increase the amount of memory allocated for columns of type SQLT_RID and SQLT_RDD from 23 bytes to 140 bytes.

add missing Tcl__DecrRefCount() to an error condition

Test return codes from Tcl functions,
Convert from Tcl_Eval() to Tcl_EvalObjEx().

remove extra white space

remove blank space