[ooc-compiler] oo2c-2.1.9 released

[Michael v. A. <Mic...@de...>]

(oo2c) Within a type-bound procedure, type variables can now be used
on the right hand side of a type test or type guard.

(oo2c) Fix crash due to failing error recovery (#1227684, #1227687),
as well as an overeager assertion.

(oo2c) Always provide ` --tag=CXX' when calling libtool.

(oob) Fix output syntax of procedure types.
 
(ADT:Dictionary) New method Lookup() that returns a boolean value to
indicate success or failure.  The looked up value is returned through
a VAR parameter.  (Thanks to vedmed)

(OS:HostPath) MINGW: Allocate temporary strings in Oberon-2 arrays,
rather than C arrays.  This fixes a serious bug in the Windows path
normalisation functions, which can cause failures on some hardware due
to due to array descriptors being absent (run-time system uses illegal
array length value).

(RT0) Change argv to use the type C.charPtr2d

The generated C code and (for the most part) the library modules
written in C should not produce warnings when compiled with gcc4.

-- mva