Update test2038.c

https://github.com/Hamlib/Hamlib/issues/1478

tests/test2038.c

@@ -6,28 +6,40 @@ Does fail when compiled with gcc -m32 -o 2038 2038.c
 #include <time.h>
 #include <string.h>
 
-int main(void)
+int test2038(void)
 {
     time_t x;
 
+    //printf("sizeof(time_t)=%d\n", (int)sizeof(time_t));
+
     x = (time_t)((1U << 31) - 1);
+    //printf("x=%lu\n", (unsigned long)x);
     char *s = ctime(&x);
 
-    //printf("%s", s);
+    //printf("%s\n", s);
+    //printf("x=%lu\n", (unsigned long)x);
     if (!strstr(s, "2038")) { return 1; }
 
     x += 1;
     s = ctime(&x);
 
+    //printf("x=%lu\n", (unsigned long)x);
+    //printf("%s\n", s);
     if (!strstr(s, "2038")) { return 1; }
 
-    //printf("%s", s);
+    //printf("x=%lu\n", (unsigned long)x);
+    //printf("%s\n", s);
     x += 1;
     s = ctime(&x);
 
     if (!strstr(s, "2038")) { return 1; }
 
-    //printf("%s", s);
+    //printf("%s\n", s);
 
     return 0;
 }
+
+int main(void)
+{
+    return test2038();
+}