pseudo: only dump pseudos if SQUASHFS_TRACE defined

Signed-off-by: Phillip Lougher <phillip@squashfs.org.uk>
diff --git a/squashfs-tools/pseudo.c b/squashfs-tools/pseudo.c
index 10c0b6a..fdb19fe 100644
--- a/squashfs-tools/pseudo.c
+++ b/squashfs-tools/pseudo.c
@@ -547,6 +547,7 @@
 }
 
 
+#ifdef SQUASHFS_TRACE
 static void dump_pseudo(struct pseudo *pseudo, char *string)
 {
 	int i, res;
@@ -577,3 +578,8 @@
 {
 	dump_pseudo(pseudo, NULL);
 }
+#else
+void dump_pseudos()
+{
+}
+#endif