patch 9.1.0298: MS-Windows: GETTEXT_PATH hard-coded in src/po/Make_mvc.mak

Problem:  MS-Windows: GETTEXT_PATH hard-coded in src/po/Make_mvc.mak
Solution: Add IFNDEF/ENDIF around the definition of GETTEXT_PATH
          (Cthulhux)

It makes no sense to enforce modifying Vim source files just because
your build stuff is not where it's expected. My change is supposed to
add support for a locally-defined %GETTEXT_PATH%.

closes: #14480

Signed-off-by: Cthulhux <github@tuxproject.de>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/version.c b/src/version.c
index 5bf9581..520b7e9 100644
--- a/src/version.c
+++ b/src/version.c
@@ -705,6 +705,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    298,
+/**/
     297,
 /**/
     296,