Warning cleanup from the MSVC compile.

FossilOrigin-Name: 26cd015c0ee1c18dd37f11b47ce35cfa320b3514
diff --git a/src/where.c b/src/where.c
index f23133b..9859ab5 100644
--- a/src/where.c
+++ b/src/where.c
@@ -2357,7 +2357,7 @@
     nRow = (double)(aiRowEst[nEq] * nInMul);
     if( bInEst && nRow*2>aiRowEst[0] ){
       nRow = aiRowEst[0]/2;
-      nInMul = nRow / aiRowEst[nEq];
+      nInMul = (int)(nRow / aiRowEst[nEq]);
     }
 
     /* Assume constant cost to access a row and logarithmic cost to