Remove a needless include of rpc_compat.h Nothing in evrpc.c was using rpc_compat.h, so it's best to take it out, especially since it polluted our build process with GCC variadic macros. While we're at it, this patch puts an extra restriction on when the variadic macros in rpc_compat.h are defined. Not only must GCC be the compiler, but GCC must not be running in -ansi mode.