Clean the root dir

Otherwise a root that ends in / will cause vendor detection to loop
forever.

Fixes #382

Changelog.md

@@ -1,3 +1,8 @@
+# v44 2015/12/23
+
+* Clean package roots when attempting to find a vendor directory so we don't loop forever.
+    * Fixes 382
+
 # v43 2015/12/22
 
 * Better error messages when parsing Godeps.json: Fixes #372

list.go

@@ -187,7 +187,8 @@ func findDirForPath(path string, ip *build.Package) (string, error) {
 	// We need to check to see if the import exists in vendor/ folders up the hierachy of the importing package
 	if VendorExperiment && ip != nil {
 		debugln("resolving vendor posibilities:", ip.Dir, ip.Root)
-		for base := ip.Dir; base != ip.Root; base = filepath.Dir(base) {
+		cr := filepath.Clean(ip.Root)
+		for base := ip.Dir; base != cr; base = filepath.Dir(base) {
 			s := filepath.Join(base, "vendor", path)
 			debugln("Adding search dir:", s)
 			search = append(search, s)

version.go

@@ -5,7 +5,7 @@ import (
 	"runtime"
 )
 
-const version = 43
+const version = 44
 
 var cmdVersion = &Command{
 	Name:  "version",