virPCIDeviceAddressAsString: Fix const correctness

This function does not change any of the passed addresses. It
just reads them.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>
ACKed-by: NPeter Krempa <pkrempa@redhat.com>

src/util/virpci.c

@@ -1744,7 +1744,7 @@ virPCIDeviceAddressEqual(const virPCIDeviceAddress *addr1,
 }
 
 char *
-virPCIDeviceAddressAsString(virPCIDeviceAddressPtr addr)
+virPCIDeviceAddressAsString(const virPCIDeviceAddress *addr)
 {
     char *str;
 

src/util/virpci.h

@@ -236,7 +236,7 @@ bool virPCIDeviceAddressIsEmpty(const virPCIDeviceAddress *addr);
 bool virPCIDeviceAddressEqual(const virPCIDeviceAddress *addr1,
                               const virPCIDeviceAddress *addr2);
 
-char *virPCIDeviceAddressAsString(virPCIDeviceAddressPtr addr)
+char *virPCIDeviceAddressAsString(const virPCIDeviceAddress *addr)
       ATTRIBUTE_NONNULL(1);
 
 int virPCIDeviceAddressParse(char *address, virPCIDeviceAddressPtr bdf);