intel/tools: add missing variable initialisation

Fixes: 6a60beba40 "intel/tools: Add an error state to aub translator"
Signed-off-by: Eric Engestrom <eric.engestrom@intel.com>
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>

src/intel/tools/error2aub.c

@@ -205,7 +205,7 @@ main(int argc, char *argv[])
       BO_TYPE_UNKNOWN = 0,
       BO_TYPE_BATCH,
       BO_TYPE_USER,
-   } bo_type;
+   } bo_type = BO_TYPE_UNKNOWN;
    uint64_t bo_addr;
 
    char *line = NULL;