Error in size_to_fit.lua with version 7.0.0.20-Beta

[MuffinManKen]

Message: ...dOns\GnomishVendorShrinker\externals\size_to_fit.lua:32: Usage: :SetSize(width, height)
Time: 10/03/16 14:56:41
Count: 1
Stack: [C]: ?
[C]: in function SetSize' ...dOns\GnomishVendorShrinker\externals\size_to_fit.lua:32: in functionSizeToFit'
...dOns\GnomishVendorShrinker\externals\size_to_fit.lua:16: in function <...dOns\GnomishVendorShrinker\externals\size_to_fit.lua:13>
...dOns\GnomishVendorShrinker\externals\size_to_fit.lua:28: in function SizeToFit' ...\AddOns\GnomishVendorShrinker\frames\AltCurrency.lua:29: in functionSetValue'
...AddOns\GnomishVendorShrinker\frames\MerchantItem.lua:101: in function SetValue' ...ce\AddOns\GnomishVendorShrinker\frames\MainFrame.lua:42: in function <...ce\AddOns\GnomishVendorShrinker\frames\MainFrame.lua:33> [C]: in functionSetValue'
...ce\AddOns\GnomishVendorShrinker\frames\MainFrame.lua:68: in function <...ce\AddOns\GnomishVendorShrinker\frames\MainFrame.lua:65>
Interface\AddOns\GnomishVendorShrinker\Init.lua:30: in function <Interface\AddOns\GnomishVendorShrinker\Init.lua:30>
[C]: in function SetMerchantFilter' Interface\AddOns\+Wowhead_Looter\Wowhead_Looter.lua:1028: in functionwlEvent_MERCHANT_UPDATE'
Interface\AddOns+Wowhead_Looter\Wowhead_Looter.lua:1008: in function `?'
Interface\AddOns+Wowhead_Looter\Wowhead_Looter.lua:4089: in function <Interface\AddOns+Wowhead_Looter\Wowhead_Looter.lua:4087>

Locals:

[MuffinManKen]

Reverting to beta 19 fixed the issue.

[MuffinManKen]

With Beta 21 the same error pops the first time I go to a merchant, but after that it's fine.