Here, i have attached the PDF, that PDF document contains "Nudi" as an embedded font. When i searching the particular word (that in Nudi font), the search result selecting the word that context next to the exact word.

Link to PDF file (or attach file here):
[sample_pdf.zip](https://github.com/mozilla/pdf.js/files/229582/sample_pdf.zip)

Configuration:
- Web browser and its version: Mozilla 45.0.2
- Operating system and its version: Windows 7
- PDF.js version: 1.4.20-disc

What is the expected behavior? (add screenshot)
![find_01](https://cloud.githubusercontent.com/assets/17423938/14704922/c2e67f2c-07d4-11e6-9320-9aed2578d377.png)

this._findTimeout = setTimeout(() => {
          this._nextMatch();
          this._findTimeout = null;
        }, FIND_TIMEOUT);
      } else if (this._dirtyMatch) {
        
        
        this._nextMatch();
      } else if (cmd === "findagain") {
        this._nextMatch();
        
        
        if (findbarClosed && this._state.highlightAll) {
          this._updateAllPages();
        }
      } else if (cmd === "findhighlightallchange") {
        
        
        if (pendingTimeout) {
          this._nextMatch();
        } else {
          this._highlightMatches = true;
        }
        this._updateAllPages(); 
      } else {
        this._nextMatch();
      }
    });
  }
  scrollMatchIntoView({ element = null, pageIndex = -1, matchIndex = -1 }) {