nil reference exception if localization text is empty

[MJacred]

Reproduction steps:

have a localization file, e.g. active.en.toml, with the content Test = "" and run the following command in your terminal in the appropriate directory:

goi18n merge active.*.toml

to generate your updated translate.*.toml files.

Analysis

The execution of the above mentioned command will cause a nil reference exception here

go-i18n/v2/goi18n/merge_command.go

Line 132 in 26334ab

if sourceMessageTemplates[template.ID] != nil {

because a nil value was added here

go-i18n/v2/goi18n/merge_command.go

Line 128 in 26334ab

templates[m.ID] = i18n.NewMessageTemplate(m)