LaTeX template: Set default listings language for lua, assembler.

Otherwise we get an error when trying to compile code
with lua or assembler code.

To change the default dialect (currenty 5.3 for lua
and x86masm for assembler), you can use `--include-in-header`
to inject something like

    \lstset{defaultdialect=[5.2]Lua}

Closes #5227.

data/templates/default.latex

@@ -231,6 +231,8 @@ $endif$
 $if(listings)$
 \usepackage{listings}
 \newcommand{\passthrough}[1]{#1}
+\lstset{defaultdialect=[5.3]Lua}
+\lstset{defaultdialect=[x86masm]Assembler}
 $endif$
 $if(lhs)$
 \lstnewenvironment{code}{\lstset{language=Haskell,basicstyle=\small\ttfamily}}{}

test/lhs-test.latex+lhs

@@ -40,6 +40,8 @@
 \urlstyle{same}  % don't use monospace font for urls
 \usepackage{listings}
 \newcommand{\passthrough}[1]{#1}
+\lstset{defaultdialect=[5.3]Lua}
+\lstset{defaultdialect=[x86masm]Assembler}
 \lstnewenvironment{code}{\lstset{language=Haskell,basicstyle=\small\ttfamily}}{}
 \setlength{\emergencystretch}{3em}  % prevent overfull lines
 \providecommand{\tightlist}{%