Fixed rare index bug when using multiple multithreading consumers

FastRng/MultiThreadedRng.cs

@@ -295,6 +295,11 @@ public sealed class MultiThreadedRng<TNum> : IRandom<TNum>, IDisposable where TN
         // Made a local copy of the current pointer:
         var myPointer = this.currentBufferPointer;
         
+        // Issue #8: This might happens when the current thread was interrupted by another thread, and
+        // the other thread has already updated the pointer. In this case, we start over again.
+        if (myPointer >= BUFFER_SIZE)
+            goto Start;
+        
         // Increment the pointer for the next thread or call:
         var nextPointer = myPointer + 1;
         
@@ -303,7 +308,7 @@ public sealed class MultiThreadedRng<TNum> : IRandom<TNum>, IDisposable where TN
             goto Start;
 
         //
-        // Case: Success. We updated the pointer and, thus, can use the read number.
+        // Case: Success. We updated the pointer and, thus, can use it to read the number.
         //
         return this.currentBuffer[myPointer];
     }