updated for version 7.3.754
Problem:    Latest nmake is not recognized.
Solution:   Add nmake version 11.00.51106.1. (Raymond Ko)
diff --git a/src/Make_mvc.mak b/src/Make_mvc.mak
index ef75193..4d8b669 100644
--- a/src/Make_mvc.mak
+++ b/src/Make_mvc.mak
@@ -413,6 +413,9 @@
 !if "$(_NMAKE_VER)" == "11.00.50727.1"
 MSVCVER = 11.0
 !endif
+!if "$(_NMAKE_VER)" == "11.00.51106.1"
+MSVCVER = 11.0
+!endif
 !endif
 
 # Abort bulding VIM if version of VC is unrecognised.