Avoid calling cloud API if vid or pid are invalid (arduino#439)

* avoid calling cloud API if vid or pid are invalid

* user regex

Author: Massimiliano Pippi

arduino/libraries/librariesmanager/librariesmanager.go

@@ -209,7 +209,8 @@ func (sc *LibrariesManager) LoadLibrariesFromDir(librariesDir *LibrariesDir) err
 // name and version or, if the version is nil, the library installed
 // in the sketchbook.
 func (sc *LibrariesManager) FindByReference(libRef *librariesindex.Reference) *libraries.Library {
-	alternatives, have := sc.Libraries[libRef.Name]
+	saneName := utils.SanitizeName(libRef.Name)
+    alternatives, have := sc.Libraries[saneName]
 	if !have {
 		return nil
 	}