Bug 1248757 followup - Release blob after assignment in DoGetBlobAsString on CLOSED TREE.

MozReview-Commit-ID: HOsMvsjBJKF

--HG--
extra : source : cac755e67ad9739d72f78a184f20bafd845e514f

storage/mozStoragePrivateHelpers.h

@@ -105,6 +105,7 @@ DoGetBlobAsString(T* aThis, uint32_t aIndex, V& aValue)
   NS_ENSURE_SUCCESS(rv, rv);
 
   aValue.Assign(blob, size / sizeof(char_type));
+  delete[] blob;
   return NS_OK;
 }