intel/dump_gpu: set default device_override

Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/2201>
diff --git a/src/intel/tools/intel_dump_gpu.c b/src/intel/tools/intel_dump_gpu.c
index 67f8559..ba4d2b8 100644
--- a/src/intel/tools/intel_dump_gpu.c
+++ b/src/intel/tools/intel_dump_gpu.c
@@ -58,7 +58,7 @@
 static char *output_filename = NULL;
 static FILE *output_file = NULL;
 static int verbose = 0;
-static bool device_override;
+static bool device_override = false;
 
 #define MAX_FD_COUNT 64
 #define MAX_BO_COUNT 64 * 1024