Fix compilation errors for x86-64 SDK

Various socket parameters were size_t instead of socklen_t,
which are equivalent on 32-bit machines but not 64-bit.

Change-Id: Ibf08ff9a7128cfcb4b5e114d43cd6a24ba68cf97
Signed-off-by: Ratan Gupta <ratagupt@in.ibm.com>
Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
diff --git a/sock_channel.hpp b/sock_channel.hpp
index 1bd047e..0ba0df1 100644
--- a/sock_channel.hpp
+++ b/sock_channel.hpp
@@ -26,7 +26,7 @@
                 sockaddr sockAddr;
                 sockaddr_in6 inAddr;
             };
-            size_t addrSize;
+            socklen_t addrSize;
         };
 
         /**