patch 8.0.0452: some macros are in lower case

Problem:    Some macros are in lower case.
Solution:   Make a few more macros upper case.
diff --git a/src/evalfunc.c b/src/evalfunc.c
index 7e03d4d..21b75c1 100644
--- a/src/evalfunc.c
+++ b/src/evalfunc.c
@@ -3534,7 +3534,7 @@
 	    }
 	}
 	count = (long)(foldend - foldstart + 1);
-	txt = ngettext("+-%s%3ld line: ", "+-%s%3ld lines: ", count);
+	txt = NGETTEXT("+-%s%3ld line: ", "+-%s%3ld lines: ", count);
 	r = alloc((unsigned)(STRLEN(txt)
 		    + STRLEN(dashes)	    /* for %s */
 		    + 20		    /* for %3ld */