Fix compiler warning:
In file included from v_config.c:26:0:
v_config.h:32:12: warning: redundant redeclaration of ‘signal_terminate’ [-Wredundant-decls]
In file included from v_config.h:26:0,
from v_config.c:26:
vgrabbj.h:308:24: note: previous declaration of ‘signal_terminate’ was here
