With empty \titlegraphic the template will not compile

[Adam Liter]

The file tikzposter-template.tex does not compile if \titlegraphic is empty.

It throws the error:

LaTeX Error: There's no line here to end.

Changing:

\gdef\TP@maketitle{
    \centering
    \vbox{
    \@titlegraphic
        \\[\TP@titlegraphictotitledistance]
        \centering
        \color{titlefgcolor}
        {\bfseries \Huge \sc \@title \par}
        \vspace*{1em}
        {\huge \@author \par}
        \vspace*{1em}
        {\LARGE \@institute}
    }
}

to

\gdef\TP@maketitle{
    \centering
    \vbox{
     \ifx\@titlegraphic\@empty%
        %
     \else%
        \@titlegraphic\\[\TP@titlegraphictotitledistance]%
     \fi%
        \centering
        \color{titlefgcolor}
        {\bfseries \Huge \sc \@title \par}
        \vspace*{1em}
        {\huge \@author \par}
        \vspace*{1em}
        {\LARGE \@institute}
    }
}

fixes this.

[Adam Liter]

Actually, a better fix would be to use etoolbox's \ifdefempty in case of \titlegraphic{ } (see here):

\gdef\TP@maketitle{
    \centering
    \vbox{
      \ifdefempty{\@titlegraphic}{}{%
        \@titlegraphic\\[\TP@titlegraphictotitledistance]}
        \centering
        \color{titlefgcolor}
        {\bfseries \Huge \sc \@title \par}
        \vspace*{1em}
        {\huge \@author \par}
        \vspace*{1em}
        {\LARGE \@institute}
    }
}

[matthewjohnrussell]

Any progress on getting the fix into the main code? I just got hit by the bug and it took me a while to figure out it was a problem in the documentclass rather than in my own code (partly due to the lack of line numbers in the Latex error for some reason)! Thanks