updated for version 7.3.702
Problem:    Nmake from VS6 service pack 6 is not recognized.
Solution:   Detect the version number. (Jiri Sedlak)
diff --git a/src/Make_mvc.mak b/src/Make_mvc.mak
index 357b677..3ac2960 100644
--- a/src/Make_mvc.mak
+++ b/src/Make_mvc.mak
@@ -373,6 +373,10 @@
 MSVCVER = 6.0
 CPU = ix86
 !endif
+!if "$(_NMAKE_VER)" == "6.00.9782.0"
+MSVCVER = 6.0
+CPU = ix86
+!endif
 !if "$(_NMAKE_VER)" == "7.00.9466"
 MSVCVER = 7.0
 !endif