try exec, as read was an infinite loop

imgult

@@ -153,7 +153,7 @@ RUN_OVERLOAD_PROTECTION_ENCABULATOR
 ## let everything complete
 while [ -e imgult-files.txt ]; do
   if [ "`pgrep egrep`" ] \
-    || [ "`pgrep exiv2`" ] || [ "`pgrep read`" ] \
+    || [ "`pgrep exiv2`" ] || [ "`pgrep exec`" ] \
     || [ "`pgrep jpegtran`" ] || [ "`pgrep jpegoptim`" ] \
     || [ "`pgrep pngquant`" ] || [ "`pgrep optipng`" ] \
     || [ "`pgrep gifsicle`" ] || [ "`pgrep svgo`" ] \