examples: use unsigned int for bitfields

examples/args.h

@@ -8,7 +8,7 @@ struct args_info {
 	int    argc;
 	char **argv;
 	int    pos;
-	int    opts_done : 1; /**< Did we see a -- separator */
+	unsigned int opts_done : 1; /**< Did we see a -- separator */
 };
 #define ARGS_INFO_INIT { argc, argv, 0, 0 }
 #define ARGS_CURRENT(args) args->argv[args->pos]

examples/checkout.c

@@ -35,9 +35,9 @@
  */
 
 typedef struct {
-	int force : 1;
-	int progress : 1;
-	int perf : 1;
+	unsigned int force : 1;
+	unsigned int progress : 1;
+	unsigned int perf : 1;
 } checkout_options;
 
 static void print_usage(void)

examples/merge.c

@@ -30,7 +30,7 @@ struct merge_options {
 	git_annotated_commit **annotated;
 	size_t annotated_count;
 
-	int no_commit : 1;
+	unsigned int no_commit : 1;
 };
 
 static void print_usage(void)