BUG: styler.to_latex does hide rows after hide_index([subset])

[attack68]

• I have checked that this issue has not already been reported.

• I have confirmed this bug exists on the latest version of pandas.

• I have confirmed this bug exists on the master branch of pandas.

Reproducible Example

>>> df = DataFrame([[1], [2]])
>>> print(df.style.hide_index([0]).to_latex())
\begin{tabular}{lr}
 & 0 \\
 \\
1 & 2 \\
\end{tabular}

Issue Description

its the header cells that render as empty spaces creating an unwanted line.

Expected Behavior

no unwanted line.

Installed Versions

master