unramified => loc qf for stacks

Thanks to Anonymous
https://stacks.math.columbia.edu/tag/0CIY#comment-7770

stacks-morphisms.tex

@@ -8166,6 +8166,21 @@ \section{Unramified morphisms}
 This finishes the proof.
 \end{proof}
 
+\begin{lemma}
+\label{lemma-unramified-quasi-finite}
+An unramified morphism of algebraic stacks is locally quasi-finite.
+\end{lemma}
+
+\begin{proof}
+This follows from
+Lemma \ref{lemma-unramified} (characterizing unramified morphisms),
+Lemma \ref{lemma-characterize-locally-quasi-finite} (characterizing
+locally quasi-finite morphisms), and
+Morphisms of Spaces, Lemma
+\ref{spaces-morphisms-lemma-unramified-quasi-finite} (the corresponding
+result for algebraic spaces).
+\end{proof}
+
 \begin{lemma}
 \label{lemma-permanence-unramified}
 Let $\mathcal{X} \to \mathcal{Y} \to \mathcal{Z}$ be