Version Generator: fix strange crash.

- The version generator would crash on me at every two full rebuilds. While
  investigating, I realized that as soon as I was echoing something, the
  script would work as intended, making it nearly impossible to debug. It also
  had the side effect of fixing the problem! So by adding the smallest
  possible echo (`ECHO.`), the bug is fixed.

[#12]

Signed-off-by: Jocelyn Legault <jocelynlegault@gmail.com>

scripts/GIT-VS-VERSION-GEN.bat

@@ -93,6 +93,7 @@ REM ===================
 REM Entry Point
 REM ===================
 :START
+ECHO.
 CALL :INIT_VARS
 CALL :GET_VERSION_STRING
 IF DEFINED fGIT_AVAILABLE (