rolled back accidental commit.

Author: dghgit

core/src/main/java/org/bouncycastle/asn1/x509/Extensions.java

@@ -71,8 +71,10 @@ else if (obj != null)
     private Extensions(
         ASN1Sequence seq)
     {
-        // it's tempting to check there's at least one entry in the sequence. Don't!
-        // It turns out there's quite a few empty extension blocks out there...
+        if (seq.size() == 0)
+        {
+            throw new IllegalArgumentException("empty extension sequence found");
+        }
 
         Enumeration e = seq.getObjects();