patch 7.4.1683

Problem:    Generated .bat files do not support --nofork.
Solution:   Add check for --nofork.  Also add "setlocal". (Kevin Cantú,
            closes #659)

Author: brammool

src/dosinst.c

@@ -762,6 +762,7 @@ install_bat_choice(int idx)
 	    fprintf(fd, "@echo off\n");
 	    fprintf(fd, "rem -- Run Vim --\n");
 	    fprintf(fd, "\n");
+	    fprintf(fd, "setlocal\n");
 
 	    /* Don't use double quotes for the "set" argument, also when it
 	     * contains a space.  The quotes would be included in the value
@@ -793,6 +794,9 @@ install_bat_choice(int idx)
 	    fprintf(fd, "if .%%1==. goto loopend\n");
 	    if (*exename == 'g')
 	    {
+		fprintf(fd, "if NOT .%%1==.--nofork goto noforklongarg\n");
+		fprintf(fd, "set VIMNOFORK=1\n");
+		fprintf(fd, ":noforklongarg\n");
 		fprintf(fd, "if NOT .%%1==.-f goto noforkarg\n");
 		fprintf(fd, "set VIMNOFORK=1\n");
 		fprintf(fd, ":noforkarg\n");

src/version.c

@@ -748,6 +748,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1683,
 /**/
     1682,
 /**/