Merge pull request #104 from ParsePlatform/nlutsenko.object

Fixed too agressive deallocation for PFObject when fetch/delete is in  progress.

Author: nlutsenko

Parse/PFObject.m

@@ -1561,11 +1561,9 @@ - (BFTask *)saveAsync:(BFTask *)toAwait {
 
 - (BFTask *)fetchAsync:(BFTask *)toAwait {
     PFCurrentUserController *controller = [[self class] currentUserController];
-    @weakify(self);
     return [[controller getCurrentUserSessionTokenAsync] continueWithBlock:^id(BFTask *task) {
         NSString *sessionToken = task.result;
         return [toAwait continueAsyncWithBlock:^id(BFTask *task) {
-            @strongify(self);
             return [[[self class] objectController] fetchObjectAsync:self withSessionToken:sessionToken];
         }];
     }];
@@ -1575,11 +1573,9 @@ - (BFTask *)deleteAsync:(BFTask *)toAwait {
     [self checkDeleteParams];
 
     PFCurrentUserController *controller = [[self class] currentUserController];
-    @weakify(self);
     return [[controller getCurrentUserSessionTokenAsync] continueWithBlock:^id(BFTask *task) {
         NSString *sessionToken = task.result;
         return [toAwait continueAsyncWithBlock:^id(BFTask *task) {
-            @strongify(self);
             return [[[self class] objectController] deleteObjectAsync:self withSessionToken:sessionToken];
         }];
     }];