Merge remote branch 'upstream/master'

diff --cc pdf.js
index 2d05295c166bc6b9a8ff8ec765c9865ab26950d4,7e748cfd8802fc7a18d1df6cc2ea750cddf7c1eb..82cfb4c81dcf313482472d4c70d184b276b76d07
--- 1/pdf.js
--- 2/pdf.js
+++ b/pdf.js
@@@ -4308,9 -4304,8 +4308,8 @@@ var PartialEvaluator = (function() 
              var index = GlyphsUnicode[glyph] || i;
              glyphsMap[glyph] = encodingMap[i] = index;
  
 -            if (index <= 0x1f || (index >= 127 && index <= 255))
 +            if (!isDisplayable(index))
                glyphsMap[glyph] = encodingMap[i] += kCmapGlyphOffset;
-             
            }
          }