Fix tripwire compile errors per this discussion: https://sourceforge.net/p/tripwire/bugs/54/

src/cryptlib/algebra.h

@@ -273,7 +273,7 @@ template <class T> T AbstractEuclideanDomain<T>::Gcd(const Element &a, const Ele
 	Element g[3]={b, a};
 	unsigned int i0=0, i1=1, i2=2;
 
-	while (!Equal(g[i1], this->Zero()))
+	while (!this->Equal(g[i1], this->Zero()))
 	{
 		g[i2] = Mod(g[i0], g[i1]);
 		unsigned int t = i0; i0 = i1; i1 = i2; i2 = t;

src/twadmin/twadmincl.cpp

@@ -33,6 +33,7 @@
 // twadmincl.cpp -- command line parsing for twadmin
 //
 
+#include <unistd.h>
 #include "stdtwadmin.h"
 
 #include "twadmincl.h"