1 files changed, 6 insertions, 1 deletions
diff --git a/tex/generic/context/luatex/luatex-fonts-merged.lua b/tex/generic/context/luatex/luatex-fonts-merged.lua
index 46ff6c4c2..c77cd4626 100644
--- a/tex/generic/context/luatex/luatex-fonts-merged.lua
+++ b/tex/generic/context/luatex/luatex-fonts-merged.lua
@@ -1,6 +1,6 @@
 -- merged file : luatex-fonts-merged.lua
 -- parent file : luatex-fonts.lua
--- merge date  : 06/05/12 17:36:46
+-- merge date  : 06/05/12 21:45:24
 
 do -- begin closure to overcome local limits and interference
 
@@ -118,6 +118,11 @@ function string.topattern(str,lowercase,strict)
     end
 end
 
+
+function string.valid(str,default)
+    return (type(str) == "string" and str ~= "" and str) or default or nil
+end
+
 -- obsolete names:
 
 string.quote   = string.quoted