Bug 300853 Caps crash on cleanup [@ DomainPolicy::Drop]

patch by g.maone@informaction.com r=caillon sr=dveditz a=bsmedberg


git-svn-id: svn://10.0.0.236/trunk@176283 18797224-902f-48f8-a5cc-f745e15eee43

mozilla/caps/src/nsScriptSecurityManager.cpp

@@ -24,6 +24,7 @@
  *   Mitch Stoltz
  *   Steve Morse
  *   Christopher A. Aillon
+ *   Giorgio Maone
  *
  * Alternatively, the contents of this file may be used under the terms of
  * either of the GNU General Public License Version 2 or later (the "GPL"),
@@ -2891,7 +2892,8 @@ jsval nsScriptSecurityManager::sEnabledID   = JSVAL_VOID;
 nsScriptSecurityManager::~nsScriptSecurityManager(void)
 {
     delete mOriginToPolicyMap;
-    delete mDefaultPolicy;
+    if(mDefaultPolicy)
+        mDefaultPolicy->Drop();
     delete mCapabilities;
     gScriptSecMan = nsnull;
 }
@@ -2980,8 +2982,10 @@ nsScriptSecurityManager::InitPolicies()
     DomainPolicy::InvalidateAll();
     
     //-- Release old default policy
-    if(mDefaultPolicy)
+    if(mDefaultPolicy) {
         mDefaultPolicy->Drop();
+        mDefaultPolicy = nsnull;
+    }
     
     //-- Initialize a new mOriginToPolicyMap
     mOriginToPolicyMap =