[pan2] improve speed of uudecode

[Heinrich MÃller <henmull src gnome org>]

commit 5133e2306edc9a3496fe603f07002b4444b478bc
Author: Heinrich MÃller <henmull src gnome org>
Date:   Sat Feb 2 20:50:17 2013 +0100

    improve speed of uudecode

 uulib/uunconc.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/uulib/uunconc.c b/uulib/uunconc.c
index fc2b6c6..be4f428 100644
--- a/uulib/uunconc.c
+++ b/uulib/uunconc.c
@@ -304,6 +304,9 @@ UUValidData (char *ptr, int encoding, int *bhflag)
     return 0;              /* bad string */
   }
 
+  if (encoding == YENC_ENCODED)
+    return YENC_ENCODED;
+
   while (*s && *s!='\012' && *s!='\015') {
     s++;
     len++;