clib2 Code

- Changed the stack layout used for the StackSwap() call.

- Cleaned up the commented-out sections that deal with the SAS/C
profiling code.

- Fixed the broken umask() function definition for GCC 68k and SAS/C: it
does have a return value...

- added .cvsignore file to make sure autogenerated files/dirs are not
added to the repository

- Added the test program for the sprintf() buffer flush bug, courtesy of
Jens Langner.

This commit was manufactured by cvs2svn to create tag 'V1_175'.

c.lib 1.175 (10.9.2004)

- <stdarg.h> now tries to use the compiler supplied, machine specific
<stdarg.h> file and also includes the OS4-specifc <sys/amigaos-va.h>
file, if necessary.

- Added another test to <sys/time.h> to check if the "timeval" definition is
already in place. If it is, <exec/types.h> will not be included.

- <sys/time.h> can be made to define the timeval data structure locally if
the __USE_CLIB2_TIMEVAL preprocessor symbol is defined. In this case no
<exec/types.h> or <devices/timer.h> file will be read.

- The sprintf() family did not properly handle empty strings as format
specifications. This would result in a necessary buffer flush action
getting skipped, which consequently did not put the string termination
character into the output buffer.

- Moved the POSIX<->Amiga timeval member variable definitions again.

- Broke down the tests for the __TIMEVAL_ALREADY_DEFINED and DEVICES_TIMER_H
symbols into two lines.

- <stdarg.h> now tries to use the compiler supplied, machine specific
<stdarg.h> file and also includes the OS4-specifc <sys/amigaos-va.h>
file, if necessary.

- Added another test to <sys/time.h> to check if the "timeval" definition is
already in place. If it is, <exec/types.h> will not be included.

- Replaced the rint() and rintf() functions with the fdlibm code.