Fix constraints check with *-0

PR Masterminds#176 from upstream

constraints.go

@@ -233,7 +233,7 @@ func parseConstraint(c string) (*constraint, error) {
 		patchDirty := false
 		dirty := false
 		if isX(m[3]) || m[3] == "" {
-			ver = "0.0.0"
+			ver = fmt.Sprintf("0.0.0%s", m[6])
 			dirty = true
 		} else if isX(strings.TrimPrefix(m[4], ".")) || m[4] == "" {
 			minorDirty = true

constraints_test.go

@@ -129,6 +129,7 @@ func TestConstraintCheck(t *testing.T) {
 		{"", "1", true}, // An empty string is treated as * or wild card
 		{"", "4.5.6", true},
 		{"", "1.2.3-alpha.1", false},
+		{"*-0", "1.2.3-alpha.1", true},
 		{"2", "1", false},
 		{"2", "3.4.5", false},
 		{"2", "2.1.1", true},