Quasar: touch on q-drawer calls error

[psprokofiev]

Describe the bug
While clicking any place when drawer is opened - both the drawer either backdrop, I see the error in console.

Click on drawer calls:

Uncaught TypeError: Cannot read property 'event' of undefined
    at shouldStart (touch.js:114)
    at HTMLElement.touchStart (TouchPan.js:148)

Click on backdrop calls:

Uncaught TypeError: Cannot read property 'event' of undefined
    at shouldStart (touch.js:114)
    at HTMLDivElement.touchStart (TouchPan.js:148)

To Reproduce
Steps to reproduce the behavior:

1. Open q-drawer
2. Click any place

Platform (please complete the following information):
OS: Win10 x64
Node: v12.13.0
NPM: 6.13.6
Browsers: Chrome 79.0.3945.117 (Official Build) (64-bit)

[psprokofiev]

Error only in Chrome,
IE, FF are ok.

[rstoenescu]

Fixed already in future v1.7.4 (to be released in half an hour).