winGRASS: sync VERSION_NUMBER with include/VERSION

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@50457 15284696-431f-4ddb-bdfa-cd5b030d7da7

mswindows/GRASS-Installer.nsi

@@ -37,9 +37,9 @@ SetCompressorDictSize 64
 	!define GRASS_COMMAND "grass70"
 	!define GRASS_BASE "GRASS 7.0"
 !else
-	!define VERSION_NUMBER "7.0.SVN"
+	!define VERSION_NUMBER "7.0.svn"
 	!define GRASS_COMMAND "grass70svn"
-	!define GRASS_BASE "GRASS 7.0.SVN"
+	!define GRASS_BASE "GRASS 7.0.svn"
 !endif
 
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