#44 flaw in header file va.h

[seismick]

The header file va.h (used to compile va) contains multi-line literals, which
are deprecated for some years. The real problem is that the multi-line definition
of VA_INFO is missing a closing double quote. It is necessary to replace the
last backslash with a double quote. This missing double quote will choke
older Intel compilers, somehow other compilers may issue warnings and carry on.