Fix =/== bug.

Change-Id: I42c1ede0289334b7837d468763fecc61fc4a8bea
diff --git a/libcore/luni/src/main/native/org_apache_harmony_luni_platform_OSNetworkSystem.cpp b/libcore/luni/src/main/native/org_apache_harmony_luni_platform_OSNetworkSystem.cpp
index 0dbb070..11c056d 100644
--- a/libcore/luni/src/main/native/org_apache_harmony_luni_platform_OSNetworkSystem.cpp
+++ b/libcore/luni/src/main/native/org_apache_harmony_luni_platform_OSNetworkSystem.cpp
@@ -1352,7 +1352,7 @@
                     setSockOptVal = IPV6_ADD_MEMBERSHIP;
                 }
                 if (setSockOptVal == IP_DROP_MEMBERSHIP) {
-                    setSockOptVal == IPV6_DROP_MEMBERSHIP;
+                    setSockOptVal = IPV6_DROP_MEMBERSHIP;
                 }
                 requestLength = sizeof(ipv6Request);
                 memset(&ipv6Request, 0, requestLength);