[PATCH] sstatesig: Ensure we return all matches for find_sigdata

[Richard Purdie <richard.purdie@linuxfoundation.org>]

When the hashes to find isn't specified we need to return matches from both
the sstate cache and the local stamps directory regardless of how many we've
found so far. If we don't do this, we can miss stamps and the comparison is
less accurate/incorrect.

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
---
diff --git a/meta/lib/oe/sstatesig.py b/meta/lib/oe/sstatesig.py
index 329c84d..b13d11c 100644
--- a/meta/lib/oe/sstatesig.py
+++ b/meta/lib/oe/sstatesig.py
@@ -128,7 +128,7 @@ def find_siginfo(pn, taskname, taskhashlist, d):
         else:
             filedates[fullpath] = os.stat(fullpath).st_mtime
 
-    if len(filedates) < 2 and not foundall:
+    if not taskhashlist or (len(filedates) < 2 and not foundall):
         # That didn't work, look in sstate-cache
         hashes = taskhashlist or ['*']
         localdata = bb.data.createCopy(d)