z/OS support: uint

Spell uint out as unsigned int, otherwise z/OS doesn't understand it.

src/std_utils.cc

@@ -351,9 +351,9 @@ namespace pEp {
         unsigned g_seed = gen_seed();
         std::mt19937 gen{ g_seed };
 
-        uint gen_seed()
+        unsigned int gen_seed()
         {
-            uint ret{};
+            unsigned int ret{};
             if (std::random_device{}.entropy() > 0) {
                 ret = std::random_device{}();
             } else {