Fix for panic during channel list

[vyasgun]

Description

kn channel list was panicking when a channel in the list didn't have .Spec.ChannelTemplate field set to a non-nil value.

Changes

• Added a nil check

Reference

Fixes #

[knative-prow-robot]

@vyasgun: 0 warnings.

In response to this:

Description

kn channel list was panicking when a channel in the list didn't have .Spec.ChannelTemplate field set to a non-nil value.

Changes

• Added a nil check

Reference

Fixes #

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[codecov]

Codecov Report

Merging #1568 (04de998) into main (d8670f5) will increase coverage by 0.04%.
The diff coverage is 50.00%.

@@            Coverage Diff             @@
##             main    #1568      +/-   ##
==========================================
+ Coverage   79.65%   79.70%   +0.04%     
==========================================
  Files         163      163              
  Lines        8616     8686      +70     
==========================================
+ Hits         6863     6923      +60     
- Misses       1072     1078       +6     
- Partials      681      685       +4     

Impacted Files	Coverage Δ
pkg/kn/commands/channel/flags.go	59.75% <50.00%> (-1.29%)	⬇️
cmd/kn/main.go	87.32% <0.00%> (+20.65%)	⬆️

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[knative-metrics-robot]

The following is the coverage report on the affected files.
Say /test pull-knative-client-go-coverage to re-run this coverage report

File	Old Coverage	New Coverage	Delta
pkg/kn/commands/channel/flags.go	65.7%	66.2%	0.5

[dsimansk]

Thanks!

/approve
/lgtm

[knative-prow-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: dsimansk, vyasgun

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• OWNERS [dsimansk]

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