Avoid a valgrind memcheck error. This wasn't really a valid problem as
the variable is set via a previous function call.

Valgrind was giving the error:
Conditional jump or move depends on uninitialised value(s)
for line 800:
     if (displaysize > ((int)strlen((char *) colName))) {

But at line 782/783 it is set via this:
      stat = SQLDescribeCol(hstmt, i+1, colName, sizeof(colName),
			    &colNameLen, &colType, &precision, &scale, NULL);

But to avoid this false positive warning from valgrind, I changed it
to set an initial value.



git-svn-id: svn://irodssvn.ucsd.edu/trunk@5582 ea137bd6-aa86-47b6-b90d-b101d9f19a90