Reduce interrupt checks in MCIndexNoder::intersectChains

Limit the check to once every 100000 iterations

src/noding/MCIndexNoder.cpp

@@ -71,7 +71,7 @@ MCIndexNoder::intersectChains()
     index.queryPairs([this, &overlapAction](const MonotoneChain* queryChain, const MonotoneChain* testChain) {
         queryChain->computeOverlaps(testChain, overlapTolerance, &overlapAction);
         nOverlaps++;
-        GEOS_CHECK_FOR_INTERRUPTS();
+        if ( nOverlaps % 100000 == 0 ) GEOS_CHECK_FOR_INTERRUPTS();
 
         return !segInt->isDone(); // abort early if segInt->isDone()
     });