iphlpapi: Use a seperate index to count addresses in GetAdaptersAddresses.

[Hans Leidekker]

Fixes address enumeration when an interfaces is not configured
with an IP address or when an interface is configured with more
than one address.

 -Hans

diff --git a/dlls/iphlpapi/iphlpapi_main.c b/dlls/iphlpapi/iphlpapi_main.c
index 8490c67..16cf1b3 100644
--- a/dlls/iphlpapi/iphlpapi_main.c
+++ b/dlls/iphlpapi/iphlpapi_main.c
@@ -611,7 +611,7 @@ static DWORD typeFromMibType(DWORD mib_type)
 
 static ULONG addressesFromIndex(DWORD index, DWORD **addrs, ULONG *num_addrs)
 {
-    ULONG ret, i;
+    ULONG ret, i, j;
     MIB_IPADDRTABLE *at;
 
     *num_addrs = 0;
@@ -625,9 +625,9 @@ static ULONG addressesFromIndex(DWORD index, DWORD **addrs, ULONG *num_addrs)
         HeapFree(GetProcessHeap(), 0, at);
         return ERROR_OUTOFMEMORY;
     }
-    for (i = 0; i < at->dwNumEntries; i++)
+    for (i = 0, j = 0; i < at->dwNumEntries; i++)
     {
-        if (at->table[i].dwIndex == index) (*addrs)[i] = at->table[i].dwAddr;
+        if (at->table[i].dwIndex == index) (*addrs)[j++] = at->table[i].dwAddr;
     }
     HeapFree(GetProcessHeap(), 0, at);
     return ERROR_SUCCESS;