tools: libxencall/foreignmemory: initialise handle->fd

Otherwise the osdep close on the error path touches an uninitialised
varialble.

CID: 1351231 (foreignmemory) and 1351230 (call)

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>

tools/libs/call/core.c

@@ -24,6 +24,8 @@ xencall_handle *xencall_open(xentoollog_logger *logger, unsigned open_flags)
 
     if (!xcall) return NULL;
 
+    xcall->fd = -1;
+
     xcall->flags = open_flags;
     xcall->buffer_cache_nr = 0;
 

tools/libs/foreignmemory/core.c

@@ -27,6 +27,7 @@ xenforeignmemory_handle *xenforeignmemory_open(xentoollog_logger *logger,
 
     if (!fmem) return NULL;
 
+    fmem->fd = -1;
     fmem->logger = logger;
     fmem->logger_tofree = NULL;