intel/tools: initialise bo_addr to 0 in main

Supresses a maybe-uninitialized warning with GCC 8.

Signed-off-by: Kai Wasserbäch <kai@dev.carbon-project.org>
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>

src/intel/tools/error2aub.c

@@ -206,7 +206,7 @@ main(int argc, char *argv[])
       BO_TYPE_BATCH,
       BO_TYPE_USER,
    } bo_type = BO_TYPE_UNKNOWN;
-   uint64_t bo_addr;
+   uint64_t bo_addr = 0;
 
    char *line = NULL;
    size_t line_size;