fixed freeing mismatched memory error.

mailnews/base/build/nsMsgFactory.cpp

@@ -108,8 +108,8 @@ nsMsgFactory::~nsMsgFactory()
 	NS_ASSERTION(mRefCnt == 0, "non-zero refcnt at destruction");
   
   NS_IF_RELEASE(mServiceManager);
-  delete[] mClassName;
-  delete[] mProgID;
+  PL_strfree(mClassName);
+  PL_strfree(mProgID);
 }   
 
 nsresult

mailnews/compose/build/nsMsgCompFactory.cpp

@@ -98,8 +98,8 @@ nsMsgComposeFactory::~nsMsgComposeFactory()
 	NS_ASSERTION(mRefCnt == 0, "non-zero refcnt at destruction");   
 
 	NS_IF_RELEASE(mServiceManager);
-	delete[] mClassName;
-	delete[] mProgID;
+	PL_strfree(mClassName);
+	PL_strfree(mProgID);
 }   
 
 nsresult nsMsgComposeFactory::QueryInterface(const nsIID &aIID, void **aResult)   

mailnews/db/msgdb/src/nsMsgDatabase.cpp

@@ -102,11 +102,11 @@ nsMsgDatabase::CreateMsgHdr(nsIMdbRow* hdrRow, nsFileSpec& path, nsMsgKey key, n
     if (NS_FAILED(rv)) return rv;
 
     char* msgURI = PR_smprintf("%s#%d", folderURI, key);
-    delete[] folderURI;
+	delete folderURI;
 
     nsIRDFResource* res;
     rv = rdf->GetResource(msgURI, &res);
-    delete[] msgURI;
+    PR_smprintf_free(msgURI);
     if (NS_FAILED(rv)) return rv;
     
     nsMsgHdr* msgHdr = (nsMsgHdr*)res;