Index: /trunk/Mars/msignal/MFilterData.cc
===================================================================
--- /trunk/Mars/msignal/MFilterData.cc	(revision 17885)
+++ /trunk/Mars/msignal/MFilterData.cc	(revision 17886)
@@ -111,5 +111,5 @@
             *out = *p++ * *w++;
             while (w<endw)
-                *out = *p++ * *w++;
+                *out += *p++ * *w++;
         }