#91790

s[r]=mscott
Avoid malloc of 0 - if there are no items to sort, don't try to sort them.

mailnews/base/src/nsMsgDBView.cpp

@@ -2199,6 +2199,10 @@ NS_IMETHODIMP nsMsgDBView::Sort(nsMsgViewSortTypeValue sortType, nsMsgViewSortOr
     nsVoidArray ptrs;
     PRUint32 arraySize = GetSize();
 
+    if (!arraySize) {
+       return NS_OK;
+    } /* endif */
+
     nsCOMPtr <nsISupportsArray> folders;
     GetFolders(getter_AddRefs(folders));
 

mailnews/base/src/nsMsgSearchDBView.cpp

@@ -417,6 +417,9 @@ NS_IMETHODIMP nsMsgSearchDBView::Sort(nsMsgViewSortTypeValue sortType, nsMsgView
     SaveSelection(&preservedSelection);
     PRInt32 rowCountBeforeSort = GetSize();
 
+    if (!rowCountBeforeSort)
+        return NS_OK;
+
     rv = nsMsgDBView::Sort(sortType,sortOrder);
 
     // the sort may have changed the number of rows

mailnews/base/src/nsMsgThreadedDBView.cpp

@@ -131,6 +131,9 @@ NS_IMETHODIMP nsMsgThreadedDBView::Sort(nsMsgViewSortTypeValue sortType, nsMsgVi
   SaveSelection(&preservedSelection);
   
   PRInt32 rowCountBeforeSort = GetSize();
+
+  if (!rowCountBeforeSort)
+    return NS_OK;
   
   // if the client wants us to forget our cached id arrays, they
   // should build a new view. If this isn't good enough, we