fix coverity issue in tbbmalloc HugePagesStatus

page_size variable was set to -1024 if hugepages was not used, while
being unsigned type. It did not matter as it was not used, when
hugepages are not used, but it is better to set it just to 0.

src/tbbmalloc/tbbmalloc_internal.h

@@ -496,7 +496,11 @@ class HugePagesStatus {
         MALLOC_ASSERT(!pageSize, "Huge page size can't be set twice. Double initialization.");
 
         // Initialize object variables
-        pageSize       = hugePageSize * 1024; // was read in KB from meminfo
+        if (hugePageSize > -1) {
+            pageSize = hugePageSize * 1024; // was read in KB from meminfo
+        } else {
+            pageSize = 0;
+        }
         isHPAvailable  = hpAvailable;
         isTHPAvailable = thpAvailable;
     }