infinite loop on windows

[Yuriy Balyuk]

in getProjectFileAutoGuess while loop can be infinite on Windows

langserver/nimlangserver.nim

Line 83 in 61a13ca

 while path.len > 0 and path != "/": 

path will always be "D:" for example and loop never breaks.

fix:

+    if path == dir:
+      break
     path = dir

here:

langserver/nimlangserver.nim

Line 110 in 61a13ca

 path = dir 

[Juan M Gómez]

good catch!