Add VIRTUAL serial port if you have the development version.

Cura/util/machineCom.py

@@ -11,6 +11,7 @@ from avr_isp import ispBase
 from avr_isp import intelHex
 
 from util import profile
+from util import version
 
 try:
 	import _winreg
@@ -33,6 +34,8 @@ def serialList():
 	if prev in baselist:
 		baselist.remove(prev)
 		baselist.insert(0, prev)
+	if version.isDevVersion():
+		baselist.append('VIRTUAL')
 	return baselist
 
 def baudrateList():

Cura/util/version.py

@@ -15,6 +15,10 @@ def getVersion():
 		return version.strip()
 	return "?"
 
+def isDevVersion():
+	gitPath = os.path.abspath(os.path.join(os.path.split(os.path.abspath(__file__))[0], "../../.git"))
+	return os.path.exists(gitPath)
+
 if __name__ == '__main__':
 	print(getVersion())