Fix build problems when refcount debugging is enabled.

src/core/ext/client_config/subchannel.c

@@ -219,8 +219,8 @@ static gpr_atm ref_mutate(grpc_subchannel *c, gpr_atm delta,
                             : gpr_atm_no_barrier_fetch_add(&c->ref_pair, delta);
 #ifdef GRPC_STREAM_REFCOUNT_DEBUG
   gpr_log(file, line, GPR_LOG_SEVERITY_DEBUG,
-          "SUBCHANNEL: %p % 12s 0x%08x -> 0x%08x [%s]", c, purpose, old_val,
-          old_val + delta, reason);
+          "SUBCHANNEL: %p %12s 0x%08d -> 0x%08d [%s]", c, purpose, (int)old_val,
+          (int)(old_val + delta), reason);
 #endif
   return old_val;
 }

src/core/lib/surface/completion_queue.h

@@ -57,6 +57,8 @@ typedef struct grpc_cq_completion {
   uintptr_t next;
 } grpc_cq_completion;
 
+//#define GRPC_CQ_REF_COUNT_DEBUG
+
 #ifdef GRPC_CQ_REF_COUNT_DEBUG
 void grpc_cq_internal_ref(grpc_completion_queue *cc, const char *reason,
                           const char *file, int line);

src/core/lib/transport/transport.c

@@ -43,7 +43,7 @@
 void grpc_stream_ref(grpc_stream_refcount *refcount, const char *reason) {
   gpr_atm val = gpr_atm_no_barrier_load(&refcount->refs.count);
   gpr_log(GPR_DEBUG, "%s %p:%p   REF %d->%d %s", refcount->object_type,
-          refcount, refcount->destroy.cb_arg, val, val + 1, reason);
+          refcount, refcount->destroy.cb_arg, (int)val, (int)val + 1, reason);
 #else
 void grpc_stream_ref(grpc_stream_refcount *refcount) {
 #endif
@@ -55,7 +55,7 @@ void grpc_stream_unref(grpc_exec_ctx *exec_ctx, grpc_stream_refcount *refcount,
                        const char *reason) {
   gpr_atm val = gpr_atm_no_barrier_load(&refcount->refs.count);
   gpr_log(GPR_DEBUG, "%s %p:%p UNREF %d->%d %s", refcount->object_type,
-          refcount, refcount->destroy.cb_arg, val, val - 1, reason);
+          refcount, refcount->destroy.cb_arg, (int)val, (int)val - 1, reason);
 #else
 void grpc_stream_unref(grpc_exec_ctx *exec_ctx,
                        grpc_stream_refcount *refcount) {