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)

totalPages = i + 1;
          break;
        }
      }
      const totalMatches = matchesPerPage.reduce((a, b) => {
        return a + b;
      });
      eventBus.on(
        "updatefindmatchescount",
        function onUpdateFindMatchesCount(evt) {
          if (pdfFindController.pageMatches.length !== totalPages) {
            return;
          }
          eventBus.off("updatefindmatchescount", onUpdateFindMatchesCount);
          expect(evt.matchesCount.total).toBe(totalMatches);
          for (let i = 0; i < totalPages; i++) {
            expect(pdfFindController.pageMatches[i].length).toEqual(
              matchesPerPage[i]
            );
          }
          expect(pdfFindController.selected.pageIdx).toEqual(
            selectedMatch.pageIndex
          );
          expect(pdfFindController.selected.matchIdx).toEqual(
            selectedMatch.matchIndex
          );
          resolve();
        }
      );
    });