Added some additional asserts

src/coreclr/gc/unix/gcenv.unix.cpp

@@ -900,6 +900,7 @@ static size_t GetLogicalProcessorCacheSizeFromOS()
         if (success)
         {
             assert(cacheSizeFromSysctl > 0);
+            assert(cacheSizeFromSysctl != SIZE_MAX);
             cacheSize = ( size_t) cacheSizeFromSysctl;
         }
     }
@@ -937,6 +938,7 @@ static size_t GetLogicalProcessorCacheSizeFromOS()
     }
 #endif
 
+    assert (cacheSize != SIZE_MAX);
     return cacheSize;
 }