read_csv dtype argument not working when there is a footer
xref #7141
## Datafile test.csv

col1|col2
a|438087272980
b|399432587827
c|592706116147
d|1584843561523
footer 1
## Command

print pd.read_csv('test.csv', sep='|', skipfooter=1, dtype={'col2':'object'}).dtypes
## Output

col1    object
col2     int64
dtype: object
## Expected Output

col1    object
col2    object
dtype: object
## Platform

Windows XP, Python 2.7, Pandas version 0.11.0
