kvm tools: Fix loading root device as image

Fix the loading of root device when no image name was
specified.

Signed-off-by: Sasha Levin <levinsasha928@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>

kvm-run.c

@@ -420,6 +420,7 @@ int kvm_cmd_run(int argc, const char **argv, const char *prefix)
 		if (hi) {
 			image_filename[0] = hi;
 			readonly_image[0] = true;
+			image_count++;
 		}
 	}