Fix to lowercase.

diff --git a/src/function.js b/src/function.js
index d16805b52c0620a269789d1b31932e91b596dfaf..56b405ede2c0b72e708c7088202c40a2c6fb56f0 100644 (file)
--- a/src/function.js
+++ b/src/function.js
@@ -839,7 +839,7 @@ var PostScriptLexer = (function PostScriptLexerClosure() {
         ch = stream.lookChar();
         if (ch === null)
           break;
-        ch.toLowerCase();
+        ch = ch.toLowerCase();
         if (ch >= 'a' && ch <= 'z')
           str += ch;
         else