Fix for smoke test blocker bug #39426 (the spellchecker is not being recognized as present (missing))

Corrected spellchecker progid string.
r=sfraser@netscape.com a=leaf@netcape.com

editor/ui/composer/content/editor.js

@@ -1363,7 +1363,7 @@ function IsSpellCheckerInstalled()
   if (gSoughtSpellChecker)
     return gHaveSpellChecker;
 
-  var spellcheckerClass = Components.classes["org.mozilla.spellchecker.1"]; 
+  var spellcheckerClass = Components.classes["mozilla.spellchecker.1"]; 
   gHaveSpellChecker = (spellcheckerClass != null);
   gSoughtSpellChecker = true;
   return gHaveSpellChecker;