rtpproxy: alocate anonymous structures in local scope

RTPP_CMD_IOVEC and RTPP_VCMD_INIT_STATIC are initializing a variable
with the content of another (anonymous one). If we however create the
anonymous variable in a block's scope, it will be unavailable at the
end of the block, resulting in invalid memory access - allocating the
structures in the function's context (rather than a block's context)
fixes this issue.
Bug introduced in 0d7a71b.

Author: razvancrainea

modules/rtpproxy/rtpproxy_vcmd.h

@@ -34,17 +34,15 @@ struct rtpproxy_vcmd {
 	static struct iovec var[nitems + 2] = \
 	    {{.iov_base = NULL /* cookie */}, __VA_ARGS__, {.iov_base = NULL /* terminator */}};
 
-#define RTPP_VCMD_INIT(vcmd, nitems, ...) { \
+#define RTPP_VCMD_INIT(vcmd, nitems, ...) \
 	(vcmd).vs = RTPP_CMD_IOVEC(nitems, __VA_ARGS__); \
 	(vcmd).vu = (vcmd).vs + 1; \
 	(vcmd).useritems = nitems; \
-}
 
-#define RTPP_VCMD_INIT_STATIC(vcmd, nitems, ...) { \
+#define RTPP_VCMD_INIT_STATIC(vcmd, nitems, ...) \
 	RTPP_CMD_IOVEC_STATIC(_var, nitems, __VA_ARGS__); \
 	(vcmd).vs = _var; \
 	(vcmd).vu = (vcmd).vs + 1; \
 	(vcmd).useritems = nitems; \
-}
 
 #endif