Merge pull request #2634 from WalterBright/fix7156

fix Issue 7156 - ICE(go.c): with 199 or 200 repeated integer increments,...

src/backend/go.c

@@ -221,12 +221,13 @@ void optfunc()
 
     // Each pass through the loop can reduce only one level of comma expression.
     // The infinite loop check needs to take this into account.
+    // Add 100 just to give optimizer more rope to try to converge.
     int iterationLimit = 0;
     for (b = startblock; b; b = b->Bnext)
     {
         if (!b->Belem)
             continue;
-        int d = el_countCommas(b->Belem);
+        int d = el_countCommas(b->Belem) + 100;
         if (d > iterationLimit)
             iterationLimit = d;
     }