Adding support for NotSet characterset in VS2010+ (#79)

src/_premake_init.lua

@@ -144,6 +144,7 @@
 		scope = "config",
 		kind = "string",
 		allowed = {
+			"NotSet",
 			"Default",
 			"MBCS",
 			"Unicode",

src/actions/vstudio/vs2010_vcxproj.lua

@@ -1168,7 +1168,13 @@
 
 	function m.characterSet(cfg)
 		if not vstudio.isMakefile(cfg) then
-			m.element("CharacterSet", nil, iif(cfg.characterset == p.MBCS, "MultiByte", "Unicode"))
+			local charactersets = {
+				NotSet = "NotSet",
+				MBCS = "MultiByte",
+				Unicode = "Unicode",
+				Default = "Unicode"
+			}
+			m.element("CharacterSet", nil, charactersets[cfg.characterset])
 		end
 	end
 

src/tools/msc.lua

@@ -138,6 +138,7 @@
 			Default = { '/D"_UNICODE"', '/D"UNICODE"' },
 			MBCS = '/D"_MBCS"',
 			Unicode = { '/D"_UNICODE"', '/D"UNICODE"' },
+			NotSet = { },
 		}
 	}