0026784: Coding rules - eliminate GCC warning -Wunused-parameter

OSD_Thread - use pthread_timedjoin_np() instead of pthread_join() when available (glibc extension).
Suppress unused parameter warning in OSD_Signal, NCollection_WinHeapAllocator, OpenGl_Text, OpenGl_View, V3d_View and ViewerTest.

src/NCollection/NCollection_WinHeapAllocator.cxx

@@ -37,6 +37,8 @@ NCollection_WinHeapAllocator::NCollection_WinHeapAllocator
   ULONG aHeapInfo = 2;
   HeapSetInformation (myHeapH, HeapCompatibilityInformation,
                       &aHeapInfo, sizeof(aHeapInfo));
+#else
+  (void )theInitSizeBytes;
 #endif
 }