patch 8.0.1778: script to check translations does not always work

Problem:    Script to check translations does not always work.
Solution:   Go to first line before searching for MIME.

Author: brammool

src/po/check.vim

@@ -121,6 +121,7 @@ endfunc
 
 " Check that the \n at the end of the msgid line is also present in the msgstr
 " line.  Skip over the header.
+1
 /^"MIME-Version:
 while 1
   let lnum = search('^msgid\>')

src/version.c

@@ -761,6 +761,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1778,
 /**/
     1777,
 /**/