[Qemu-trivial] [PATCH 2/4] spice-qemu-char: fix check for in-parameter

[zhanghailiang]

For qemu_chr_open_spice_vmc and qemu_chr_open_spice_port, the in-parameter
never to be NULL, because the checks in qemu_chr_parse_spice_vmc
and qemu_chr_parse_spice_port have ensured this.

So we should check the length of the in-parameter.

Signed-off-by: zhanghailiang <address@hidden>
---
 spice-qemu-char.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/spice-qemu-char.c b/spice-qemu-char.c
index 8106e06..45e7d69 100644
--- a/spice-qemu-char.c
+++ b/spice-qemu-char.c
@@ -290,7 +290,7 @@ CharDriverState *qemu_chr_open_spice_vmc(const char *type)
 {
     const char **psubtype = spice_server_char_device_recognized_subtypes();
 
-    if (type == NULL) {
+    if (type == NULL || strlen(type) == 0) {
         fprintf(stderr, "spice-qemu-char: missing name parameter\n");
         print_allowed_subtypes();
         return NULL;
@@ -315,7 +315,7 @@ CharDriverState *qemu_chr_open_spice_port(const char *name)
     CharDriverState *chr;
     SpiceCharDriver *s;
 
-    if (name == NULL) {
+    if (name == NULL || strlen(name) == 0) {
         fprintf(stderr, "spice-qemu-char: missing name parameter\n");
         return NULL;
     }
-- 
1.7.12.4