sim: add missing values to array initializers

The sim code has a lot of static initializer for options and devices, but
since they aren't using newer struct style, they have to specify a value
for every option otherwise gcc spits a lot of warnings about "missing
initializer".  So add NULL/0 stubs for pointers/values.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

sim/common/sim-model.c

@@ -37,8 +37,8 @@ static MODULE_INIT_FN sim_model_init;
 static const OPTION model_options[] = {
   { {"model", required_argument, NULL, OPTION_MODEL},
       '\0', "MODEL", "Specify model to simulate",
-      model_option_handler },
-  { {NULL, no_argument, NULL, 0}, '\0', NULL, NULL, NULL }
+      model_option_handler, NULL },
+  { {NULL, no_argument, NULL, 0}, '\0', NULL, NULL, NULL, NULL }
 };
 
 static SIM_RC