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)

if (this._resumePageIdx) {
        this._resumePageIdx = null;
        this._dirtyMatch = true;
      }
      
      this._updateUIState(FindState.FOUND);
      this._highlightMatches = false;
      this._updateAllPages(); 
    });
  }
  _requestMatchesCount() {
    const { pageIdx, matchIdx } = this._selected;
    let current = 0,
      total = this._matchesCountTotal;
    if (matchIdx !== -1) {
      for (let i = 0; i < pageIdx; i++) {
        current += (this._pageMatches[i] && this._pageMatches[i].length) || 0;
      }
      current += matchIdx + 1;
    }
    
    
    
    if (current < 1 || current > total) {
      current = total = 0;
    }
    return { current, total };
  }
  _updateUIResultsCount() {