OpenGFX 0.4.6.1 (27 Dec 2012)
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- Change: [Makefile] Allow to build OpenGFX also with NML 0.2.4 (and ignore gui sprite warning)



OpenGFX 0.4.6 (24 Dec 2012)
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- Feature: GUI sprites for delete buttons introduced in OpenTTD r24749
- Change: [Makefile] NML version check