Merge pull request #5746 from n8sh/xorshift-fix

Fix Issue 17862 - std.random.XorshiftEngine.min is wrong when bits == 32
merged-on-behalf-of: Andrei Alexandrescu <andralex@users.noreply.github.com>

std/random.d

@@ -1027,7 +1027,7 @@ if (isUnsigned!UIntType)
     /// Always $(D false) (random generators are infinite ranges).
     enum empty = false;
     /// Smallest generated value.
-    enum UIntType min = 0;
+    enum UIntType min = seeds_.length == 1 ? 1 : 0;
     /// Largest generated value.
     enum UIntType max = UIntType.max;
 
@@ -1234,6 +1234,8 @@ alias Xorshift    = Xorshift128;                            /// ditto
     static assert(isSeedable!Xorshift);
     static assert(isSeedable!(Xorshift, uint));
 
+    static assert(Xorshift32.min == 1);
+
     // Result from reference implementation.
     auto checking = [
         [2463534242UL, 901999875, 3371835698, 2675058524, 1053936272, 3811264849,