patch 7.4.1919

Problem:    Register contents is not merged when writing viminfo.
Solution:   Use timestamps for register contents.

src/version.c

@@ -753,6 +753,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1919,
 /**/
     1918,
 /**/