patch 9.1.0370: MS-Windows: patch number is zero in installer

Problem:  MS-Windows: patch number is zero in installer
          (jonathan-b-wiebe)
Solution: Set VIM_VERSION_PATCHLEVEL, fix a few typos in the installer
          (RestorerZ)

fixes: #14629
closes: #14635

Signed-off-by: RestorerZ <restorer@mail2k.ru>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/Make_mvc.mak b/src/Make_mvc.mak
index aec9efa..4d03a72 100644
--- a/src/Make_mvc.mak
+++ b/src/Make_mvc.mak
@@ -1321,6 +1321,10 @@
 
 CFLAGS_INST = /nologo /O2 -DNDEBUG -DWIN32 -DWINVER=$(WINVER) -D_WIN32_WINNT=$(WINVER) $(CFLAGS_DEPR)
 
+!IFDEF PATCHLEVEL
+CFLAGS_INST=	$(CFLAGS_INST) -DVIM_VERSION_PATCHLEVEL=$(PATCHLEVEL)
+!ENDIF
+
 install.exe: dosinst.c dosinst.h version.h
 	$(CC) $(CFLAGS_INST) dosinst.c kernel32.lib shell32.lib \
 		user32.lib ole32.lib advapi32.lib uuid.lib \