Add fallback if SIGWINCH is unavailable

darcs-hash:20060828122515-ac50b-f2b8f1519bbbd62908a6648255bfb20bdce83212.gz

fallback.h

@@ -9,6 +9,8 @@
 #include <wchar.h>
 #include <limits.h>
 #include <sys/time.h>
+#include <sys/types.h>
+#include <signal.h>
 
 #ifndef WCHAR_MAX
 /**
@@ -47,6 +49,10 @@ typedef char tputs_arg_t;
 #define SIGIO SIGUSR1
 #endif
 
+#ifndef SIGWINCH
+#define SIGIO SIGUSR2
+#endif
+
 #ifndef HAVE_WINSIZE
 struct winsize 
 {