Add parameters for backwards and forwards sizes for time buffers.

src/base/timebuf.hh:
    Add a function to return the size of the time buffer.

--HG--
extra : convert_revision : 8ffacd8b9013eb76264df065244e00dc1460efd4

src/base/timebuf.hh

@@ -215,6 +215,11 @@ class TimeBuffer
     {
         return wire(this, 0);
     }
+
+    int getSize()
+    {
+        return size;
+    }
 };
 
 #endif // __BASE_TIMEBUF_HH__