Fix secondaryipaddresses format (#443)

Author: victorserbu2709

api/structs.go

@@ -1107,7 +1107,7 @@ type InspectBasicNetworkConfig struct {
 	IPPrefixLen int `json:"IPPrefixLen"`
 	// SecondaryIPAddresses is a list of extra IP Addresses that the
 	// container has been assigned in this network.
-	SecondaryIPAddresses []string `json:"SecondaryIPAddresses,omitempty"`
+	SecondaryIPAddresses []SecondaryIPAddresses `json:"SecondaryIPAddresses,omitempty"`
 	// IPv6Gateway is the IPv6 gateway this network will use.
 	IPv6Gateway string `json:"IPv6Gateway"`
 	// GlobalIPv6Address is the global-scope IPv6 Address for this network.
@@ -1165,6 +1165,11 @@ type InspectNetworkSettings struct {
 	Networks map[string]*InspectAdditionalNetwork `json:"Networks,omitempty"`
 }
 
+type SecondaryIPAddresses struct {
+	Addr         string `json:"Addr"`
+	PrefixLength int    `json:"PrefixLength"`
+}
+
 // InspectContainerData provides a detailed record of a container's configuration
 // and state as viewed by Libpod.
 // Large portions of this structure are defined such that the output is