fix crashing when winscp is not installed

browseWithWinSCP.py

@@ -2,6 +2,7 @@
 from .dirConfig import getConfig
 
 configName = 'sftp-config.json'
+winscpExe = None
 
 for programFilesVar in ['ProgramFiles', 'ProgramFiles(x86)']:
 	try:
@@ -12,10 +13,12 @@
 	except KeyError:
 		pass
 
-startWinscpCommand = '"'+ winscpExe + '"' + ' {type}://{user}:{password}@{host}:{port}"{remote_path}"'
+if winscpExe:
+	startWinscpCommand = '"'+ winscpExe + '"' + ' {type}://{user}:{password}@{host}:{port}"{remote_path}"'
+
+	class browse_with_winscpCommand(sublime_plugin.WindowCommand):
+		def run(self, edit = None):
+			conf = getConfig(configName)
+			if conf is not None:
+				subprocess.Popen(startWinscpCommand.format(**conf), shell=True)
 
-class browse_with_winscpCommand(sublime_plugin.WindowCommand):
-	def run(self, edit = None):
-		conf = getConfig(configName)
-		if conf is not None:
-			subprocess.Popen(startWinscpCommand.format(**conf), shell=True)