Merge pull request #279 from agencyenterprise/bug/get-samples-no-metadata-wrokout

Fix: getSamples to discard workouts with no metadata

Author: GGGava

RCTAppleHealthKit/RCTAppleHealthKit+Queries.m

@@ -348,7 +348,7 @@ - (void)fetchSamplesOfType:(HKSampleType *)type
                                                    @"activityName" : type,
                                                    @"calories" : @(energy),
                                                    @"tracked" : @(isTracked),
-                                                   @"metadata" : [sample metadata],
+                                                   @"metadata" : [sample metadata] ? [sample metadata] : [NSNull null],
                                                    @"sourceName" : [[[sample sourceRevision] source] name],
                                                    @"sourceId" : [[[sample sourceRevision] source] bundleIdentifier],
                                                    @"device": device,