guard DT_* usage

It's a shortcut anyway, just leave it out

mdirs.c

@@ -42,8 +42,10 @@ mdirs(char *fpath)
 	}
 
 	while ((d = readdir(dir))) {
+#if defined(DT_DIR) && defined(DT_UNKNOWN)
 		if (d->d_type != DT_DIR && d->d_type != DT_UNKNOWN)
 			continue;
+#endif
 		if (d->d_name[0] == '.' &&
 		    d->d_name[1] == 0)
 			continue;

minc.c

@@ -33,8 +33,10 @@ inc(char *dir)
 	}
 
 	while ((d = readdir(fd))) {
+#if defined(DT_REG) && defined(DT_UNKNOWN)
 		if (d->d_type != DT_REG && d->d_type != DT_UNKNOWN)
 			continue;
+#endif
 		if (d->d_name[0] == '.')
 			continue;
 

mseq.c

@@ -54,8 +54,10 @@ namescan(char *dir)
 	if (!fd)
 		return;
 	while ((d = readdir(fd))) {
+#if defined(DT_REG) && defined(DT_UNKNOWN)
 		if (d->d_type != DT_REG && d->d_type != DT_UNKNOWN)
 			continue;
+#endif
 		if (d->d_name[0] == '.')
 			continue;
 

seq.c

@@ -328,8 +328,10 @@ iterdir(char *dir, void (*cb)(char *))
 	}
 
 	while ((d = readdir(fd))) {
+#if defined(DT_REG) && defined(DT_UNKNOWN)
 		if (d->d_type != DT_REG && d->d_type != DT_UNKNOWN)
 			continue;
+#endif
 		if (d->d_name[0] == '.')
 			continue;
 		if (fd2)