core: plug leaks when passing GValueArrays to dbus_g_method_return()

The ownership of the GValueArray is not transferred.

src/mm-modem-cdma.c

@@ -131,6 +131,8 @@ serving_system_call_done (MMModemCdma *self,
         g_value_unset (&value);
 
         dbus_g_method_return (context, array);
+
+        g_value_array_free (array);
     }
 }
 

src/mm-modem-gsm-network.c

@@ -202,6 +202,8 @@ reg_info_call_done (MMModemGsmNetwork *self,
         g_value_unset (&value);
 
         dbus_g_method_return (context, array);
+
+        g_value_array_free (array);
     }
 }
 

src/mm-modem.c

@@ -325,6 +325,8 @@ get_ip4_done (MMModem *modem,
         value_array_add_uint (array, dns3);
 
         dbus_g_method_return (context, array);
+
+        g_value_array_free (array);
     }
 }
 
@@ -413,6 +415,8 @@ info_call_done (MMModem *self,
         g_value_unset (&value);
 
         dbus_g_method_return (context, array);
+
+        g_value_array_free (array);
     }
 }