Fix breakage when path to declare ref.on() event handler differs from paths of snapshots returned by callback.

Author: FrankSalad

ios/Firestack/FirestackDatabase.m

@@ -59,7 +59,8 @@ - (void) addEventHandler:(NSString *) eventName
                                  @"eventName": eventName,
                                  @"path": [self absPath:[snapshot ref]],
                                  @"modifiersString": _modifiersString,
-                                 @"snapshot": props
+                                 @"snapshot": props,
+                                 @"handlePath": _path
                                  }];
         };
         id errorBlock = ^(NSError * _Nonnull error) {

lib/modules/database/index.js

@@ -185,8 +185,8 @@ export default class Database extends Base {
    */
   _handleDatabaseEvent(event: Object) {
     const body = event.body || {};
-    const { path, modifiersString, eventName, snapshot } = body;
-    const handle = this._handle(path, modifiersString);
+    const { path, modifiersString, eventName, snapshot, handlePath } = body;
+    const handle = this._handle(handlePath, modifiersString);
 
     this.log.debug('_handleDatabaseEvent: ', handle, eventName, snapshot && snapshot.key);