ges_events must be a table

regression in #9691 b523c2e8b9

frontend/apps/reader/modules/readerhighlight.lua

@@ -234,7 +234,7 @@ end
 
 function ReaderHighlight:setupTouchZones()
     -- delegate gesture listener to readerui
-    self.ges_events = nil
+    self.ges_events = {}
     self.onGesture = nil
 
     if not Device:isTouchDevice() then return end

frontend/apps/reader/modules/readermenu.lua

@@ -84,7 +84,7 @@ end
 
 function ReaderMenu:onReaderReady()
     -- delegate gesture listener to readerui
-    self.ges_events = nil
+    self.ges_events = {}
     self.onGesture = nil
     if not Device:isTouchDevice() then return end
 

frontend/apps/reader/modules/readerpaging.lua

@@ -126,7 +126,7 @@ end
 
 function ReaderPaging:setupTouchZones()
     -- delegate gesture listener to readerui
-    self.ges_events = nil
+    self.ges_events = {}
     self.onGesture = nil
     if not Device:isTouchDevice() then return end
 

frontend/apps/reader/modules/readerrolling.lua

@@ -332,7 +332,7 @@ end
 
 function ReaderRolling:setupTouchZones()
     -- delegate gesture listener to readerui
-    self.ges_events = nil
+    self.ges_events = {}
     self.onGesture = nil
     if not Device:isTouchDevice() then return end