read_excel crashes python for certain files
```python
import pandas
pandas.read_excel('pandas_crash.xlsx')
```
[pandas_crash.xlsx](https://github.com/pandas-dev/pandas/files/2598556/pandas_crash.xlsx) crashes the Python process.

#### Output of ``pd.show_versions()``

<details>

INSTALLED VERSIONS
------------------
commit: None
python: 3.6.6.final.0
python-bits: 64
OS: Windows
OS-release: 10
machine: AMD64
processor: Intel64 Family 6 Model 78 Stepping 3, GenuineIntel
byteorder: little
LC_ALL: None
LANG: en_US
LOCALE: None.None

pandas: 0.23.4
pytest: 3.6.3
pip: 18.1
setuptools: 39.1.0
Cython: 0.28.3
numpy: 1.15.4
scipy: 1.0.1
pyarrow: None
xarray: None
IPython: 6.2.1
sphinx: 1.7.2
patsy: None
dateutil: 2.7.3
pytz: 2018.5
blosc: None
bottleneck: None
tables: None
numexpr: 2.6.9dev0
feather: None
matplotlib: 2.2.2
openpyxl: 2.5.10
xlrd: 1.0.0
xlwt: None
xlsxwriter: None
lxml: 4.1.1
bs4: 4.6.0
html5lib: 0.9999999
sqlalchemy: 1.2.2
pymysql: 0.8.0
psycopg2: None
jinja2: 2.10
s3fs: None
fastparquet: None
pandas_gbq: None
pandas_datareader: None

</details>
