[librsvg/nmake: 3/8] win32/detectenv-msvc.mak: Detect Visual Studio 2019

[Chun-wei Fan <fanchunwei src gnome org>]

commit 8b614721695b3252c9bdffcb7135cc5a74af1712
Author: Chun-wei Fan <fanchunwei src gnome org>
Date:   Wed Jun 26 17:03:37 2019 +0800

    win32/detectenv-msvc.mak: Detect Visual Studio 2019
    
    We want to ensure that we can build with Visual Studio 2019 properly.

 win32/detectenv-msvc.mak | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)
---
diff --git a/win32/detectenv-msvc.mak b/win32/detectenv-msvc.mak
index 6fd96ccc..787a8974 100644
--- a/win32/detectenv-msvc.mak
+++ b/win32/detectenv-msvc.mak
@@ -42,8 +42,10 @@ VSVER = 11
 VSVER = 12
 !elseif $(VCVERSION) > 1899 && $(VCVERSION) < 1910
 VSVER = 14
-!elseif $(VCVERSION) > 1909 && $(VCVERSION) < 2000
+!elseif $(VCVERSION) > 1909 && $(VCVERSION) < 1920
 VSVER = 15
+!elseif $(VCVERSION) > 1919 && $(VCVERSION) < 2000
+VSVER = 16
 !else
 VSVER = 0
 !endif
@@ -51,7 +53,7 @@ VSVER = 0
 !if "$(VSVER)" == "0"
 MSG = ^
 This NMake Makefile set supports Visual Studio^
-9 (2008) through 14 (2015).  Your Visual Studio^
+9 (2008) through 16 (2019).  Your Visual Studio^
 version is not supported.
 !error $(MSG)
 !endif