bug 100649: Length() being used where IsEmpty() is meant

treewide changes to convert incorrect usages of string.Length() to string.IsEmpty().

thanks to afatecha@idea.com.py (Ariel Fatecha) for the patch. r=dwitte, sr=jst.

got the ok from Asa to land into a closed tree.


git-svn-id: svn://10.0.0.236/trunk@142828 18797224-902f-48f8-a5cc-f745e15eee43

mozilla/extensions/sql/base/src/mozSqlResult.cpp

@@ -657,7 +657,7 @@ mozSqlResult::ClearRows()
 nsresult
 mozSqlResult::EnsureTableName()
 {
-  if (mTableName.Length() > 0)
+  if (!mTableName.IsEmpty())
     return NS_OK;
 
   nsAString::const_iterator start, end;