Include signal.h before sudo_exec.h since it uses sigset_t * in the

fork_pty prototype.

src/exec_common.c

@@ -40,6 +40,7 @@
 # include <priv.h>
 #endif
 #include <errno.h>
+#include <signal.h>
 
 #include "sudo.h"
 #include "sudo_exec.h"

src/sesh.c

@@ -23,6 +23,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <signal.h>
 #include <unistd.h>
 #ifdef HAVE_SETLOCALE
 # include <locale.h>

src/utmp.c

@@ -53,6 +53,7 @@
 # include <ttyent.h>
 #endif
 #include <fcntl.h>
+#include <signal.h>
 
 #include "sudo.h"
 #include "sudo_exec.h"