Bug#45288: pb2 returns a lot of compilation warnings

Fix assorted compiler warnings.

unittest/examples/skip-t.c

@@ -18,11 +18,11 @@
 
 int main() {
   plan(4);
-  ok(1, NULL);
-  ok(1, NULL);
+  ok1(1);
+  ok1(1);
   SKIP_BLOCK_IF(1, 2, "Example of skipping a few test points in a test") {
-    ok(1, NULL);
-    ok(1, NULL);
+    ok1(1);
+    ok1(1);
   }
   return exit_status();
 }

unittest/examples/skip_all-t.c

@@ -31,9 +31,9 @@ int main() {
   if (!has_feature())
     skip_all("Example of skipping an entire test");
   plan(4);
-  ok(1, NULL);
-  ok(1, NULL);
-  ok(1, NULL);
-  ok(1, NULL);
+  ok1(1);
+  ok1(1);
+  ok1(1);
+  ok1(1);
   return exit_status();
 }

unittest/examples/todo-t.c

@@ -21,15 +21,15 @@
 int main()
 {
   plan(4);
-  ok(1, NULL);
-  ok(1, NULL);
+  ok1(1);
+  ok1(1);
   /*
     Tests in the todo region is expected to fail. If they don't,
     something is strange.
   */
   todo_start("Need to fix these");
-  ok(0, NULL);
-  ok(0, NULL);
+  ok1(0);
+  ok1(0);
   todo_end();
   return exit_status();
 }

unittest/mytap/t/basic-t.c

@@ -22,7 +22,7 @@ int main() {
   plan(5);
   ok(1 == 1, "testing basic functions");
   ok(2 == 2, " ");
-  ok(3 == 3, NULL);
+  ok1(3 == 3);
   if (1 == 1)
     skip(2, "Sensa fragoli");
   else {

unittest/mytap/tap.c

@@ -223,6 +223,23 @@ ok(int const pass, char const *fmt, ...)
   emit_endl();
 }
 
+void
+ok1(int const pass)
+{
+  va_list ap;
+
+  memset(&ap, 0, sizeof(ap));
+
+  if (!pass && *g_test.todo == '\0')
+    ++g_test.failed;
+
+  vemit_tap(pass, NULL, ap);
+
+  if (*g_test.todo != '\0')
+    emit_dir("todo", g_test.todo);
+
+  emit_endl();
+}
 
 void
 skip(int how_many, char const *fmt, ...)

unittest/mytap/tap.h

@@ -98,14 +98,25 @@ void plan(int const count);
    @endcode
 
    @param pass Zero if the test failed, non-zero if it passed.
-   @param fmt  Format string in printf() format. NULL is allowed, in
-               which case nothing is printed.
+   @param fmt  Format string in printf() format. NULL is not allowed,
+               use ok1() in this case.
 */
 
 void ok(int const pass, char const *fmt, ...)
   __attribute__((format(printf,2,3)));
 
 
+/**
+   Report test result as a TAP line.
+
+   Same as ok() but does not take a message to be printed.
+
+   @param pass Zero if the test failed, non-zero if it passed.
+*/
+
+void ok1(int const pass);
+
+
 /**
    Skip a determined number of tests.