dvips: fix displacement after blend group, #995

Author: muzimuzhi

tex/generic/pgf/systemlayer/pgfsys-dvips.def

@@ -567,7 +567,7 @@
   \wd#1=0pt
   \ht#1=0pt
   \dp#1=0pt
-  \hskip\pgf@picminx\box#1%
+  \hskip\pgf@picminx\box#1\hskip-\pgf@picminx
   \pgfsys@outerinvoke{%
     /pgffoa pgf@sys@foa def /pgfsoa pgf@sys@soa def
     grestore