COMP: cachedRandom: use OSspecific version for random number

Fixes http://www.openfoam.com/mantisbt/view.php?id=233

src/OpenFOAM/primitives/random/cachedRandom/cachedRandom.C

@@ -26,11 +26,6 @@ License
 #include "cachedRandom.H"
 #include "OSspecific.H"
 
-#if INT_MAX    != 2147483647
-#    error "INT_MAX    != 2147483647"
-#    error "The random number generator may not work!"
-#endif
-
 // * * * * * * * * * * * * * private Member Functions  * * * * * * * * * * * //
 
 Foam::scalar Foam::cachedRandom::scalar01()
@@ -79,7 +74,7 @@ Foam::cachedRandom::cachedRandom(const label seed, const label count)
     osRandomSeed(seed_);
     forAll(samples_, i)
     {
-        samples_[i] = drand48();
+        samples_[i] = osRandomDouble();
     }
 }