Consistent indentation for footnotes

This ensures that the whole text of a footnote has the same indentation
and not just the line following the footnote mark

beamertheme-source/beamerinnerthemeneo.dtx

@@ -510,7 +510,7 @@
 \setbeamertemplate{footnote}{%
   \parindent 0em\noindent%
   \raggedright
-  \usebeamercolor{footnote}\hbox to 0.8em{\hfil\insertfootnotemark}\insertfootnotetext\par%
+  \usebeamercolor{footnote}\hbox to 0.8em{\hfil\insertfootnotemark}\hangindent=0.8em\insertfootnotetext\par%
 }
 %    \end{macrocode}
 %