vgui_support: wscript: don't test if current platform supports VGUI if one of checks has failed already

vgui_support/wscript

@@ -32,6 +32,7 @@ def configure(conf):
 		conf.end_msg('no')
 		Logs.warn('vgui is not supported on this CPU: ' + str(conf.env.DEST_CPU))
 		conf.env.NO_VGUI = True
+		return
 	else:
 		conf.end_msg('yes')
 
@@ -40,6 +41,7 @@ def configure(conf):
 		conf.end_msg('no')
 		Logs.warn('vgui is not supported on this OS: ' + str(conf.env.DEST_OS))
 		conf.env.NO_VGUI = True
+		return
 	else:
 		conf.end_msg('yes')
 
@@ -49,6 +51,7 @@ def configure(conf):
 		# we have ABI incompatibility ONLY on MinGW
 		Logs.warn('vgui_support can\'t be built with MinGW')
 		conf.env.NO_VGUI = True
+		return
 	else:
 		conf.end_msg('yes')