It's subtle, since it is actually only touched by hashfp (though
we assert it's non-NULL), but give explicit advice in the default
case.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Identifiers starting with an underscore and followed immediately by a capital letter are reserved by the C++ standard.
The only header guards not fixed are those in the headers auto-generated from java.
The use of static makes this somewhat redundant currently, though if
we later have multiple compilation units it will be needed.
This also sets the dllexport needed for shared libraries on win32.
Jonas Nick
Tim Ruffing
Rusty Russell
Kirill Fomichev
Dan Raviv
Jonas Schnelli
Gregory Maxwell
Pieter Wuille
Andrew Poelstra