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._query === "") {
      this._updateUIState(FindState.FOUND);
      return;
    }
    
    if (this._resumePageIdx) {
      return;
    }
    const offset = this._offset;
    
    this._pagesToSearch = numPages;
    
    
    if (offset.matchIdx !== null) {
      const numPageMatches = this._pageMatches[offset.pageIdx].length;
      if (
        (!previous && offset.matchIdx + 1 < numPageMatches) ||
        (previous && offset.matchIdx > 0)
      ) {
        
        
        offset.matchIdx = previous ? offset.matchIdx - 1 : offset.matchIdx + 1;
        this._updateMatch( true);
        return;
      }
      
      
      this._advanceOffsetPage(previous);