avoid wrc false buffer overflow warning with -DFORTIFY_SOURCE

gcc version 4.8.2 (Ubuntu 4.8.2-19ubuntu1)

Signed-off-by: Andrei Warkentin <andrey.warkentin@gmail.com>
build fixes

A fix for errors like:
home/andreiw/src/new/open-watcom-v2/bld/browser/dlgprs/binbuild/../cpp/chbffile.cpp:187: undefined reference to `__cxa_allocate_exception'
/home/andreiw/src/new/open-watcom-v2/bld/browser/dlgprs/binbuild/../cpp/chbffile.cpp:187: undefined reference to `__cxa_throw'
/home/andreiw/src/new/open-watcom-v2/bld/browser/dlgprs/binbuild/../cpp/chbffile.cpp:196: undefined reference to `__cxa_allocate_exception'
/home/andreiw/src/new/open-watcom-v2/bld/browser/dlgprs/binbuild/../cpp/chbffile.cpp:196: undefined reference to `__cxa_throw'
chbffile.obj:(.rodata._ZTI19CheckedBufferedFile[_ZTI19CheckedBufferedFile]+0x0): undefined reference to `vtable for __cxxabiv1::__si_class_type_info'
chbffile.obj:(.eh_frame+0x3f): undefined reference to `__gxx_personality_v0'

gcc version 4.8.2 (Ubuntu 4.8.2-19ubuntu1)

Signed-off-by: Andrei Warkentin <andrey.warkentin@gmail.com>
wdmp fix

Bad param handling that resulted in this sadness:
andreiw-lnx:~/src/open-watcom-v2/bld/exedump/linuxx64/ ./wdump.exe ./wdump.exe
wdump: multiple pathnames not accepted

Signed-off-by: Andrei Warkentin <andrey.warkentin@gmail.com>
Merge pull request #129 from andreiw/master

Some fixes for OW built/building with gcc version 4.8.2 (Ubuntu 4.8.2-19ubuntu1)