6989690: java/net native code compiler warnings

Reviewed-by: alanb

src/solaris/native/java/net/PlainDatagramSocketImpl.c

@@ -2255,7 +2255,7 @@ static void mcast_join_leave(JNIEnv *env, jobject this,
             {
                 struct in_addr in;
                 struct in_addr *inP = ∈
-                int len = sizeof(struct in_addr);
+                socklen_t len = sizeof(struct in_addr);
 
 #ifdef __linux__
                 struct ip_mreqn mreqn;

src/solaris/native/sun/net/spi/DefaultProxySelector.c

@@ -158,7 +158,7 @@ Java_sun_net_spi_DefaultProxySelector_getSystemProxy(JNIEnv *env,
   char *phost = NULL;
   char *mode = NULL;
   int pport = 0;
-  int use_proxy;
+  int use_proxy = 0;
   int use_same_proxy = 0;
   const char* urlhost;
   jobject isa = NULL;