added viewall to mainstream (only Ross Mohns version, not the toggle)

view.c

@@ -273,6 +273,16 @@ view(Arg *arg)
 	arrange(NULL);
 }
 
+void
+viewall(Arg *arg)
+{
+	unsigned int i;
+
+	for(i = 0; i < ntags; i++)
+		seltag[i] = True;
+	arrange(NULL);
+}
+
 void
 zoom(Arg *arg)
 {