Don't do anything when input doclists are both empty. Ticket #2774 (CVS 4546)

FossilOrigin-Name: 75cb46f82a6a95dbe9e279dede299bafa2e91cae
2007-11-16 00:23:07 +00:00
parent a185ddbfba
commit cd7274ceb0
6 changed files with 29 additions and 17 deletions
@@ -1335,7 +1335,7 @@ static void docListUnion(
  DLWriter writer;

  if( nLeft==0 ){
-    dataBufferAppend(pOut, pRight, nRight);
+    if( nRight!=0) dataBufferAppend(pOut, pRight, nRight);
    return;
  }
  if( nRight==0 ){
@@ -1633,7 +1633,7 @@ static void docListOrMerge(
  DLWriter writer;

  if( nLeft==0 ){
-    dataBufferAppend(pOut, pRight, nRight);
+    if( nRight!=0 ) dataBufferAppend(pOut, pRight, nRight);
    return;
  }
  if( nRight==0 ){