Merge pull request #4724 from denvned/patch-1

Account for path options when pointing to the current working directory

src/compiler/commandLineParser.ts

@@ -448,6 +448,9 @@ namespace ts {
                             }
                             if (opt.isFilePath) {
                                 value = normalizePath(combinePaths(basePath, value));
+                                if (value === "") {
+                                    value = ".";
+                                }
                             }
                             options[opt.name] = value;
                         }
@@ -497,4 +500,4 @@ namespace ts {
             return fileNames;
         }
     }
-}
+}