bug fixes

tests/dt.a

@@ -0,0 +1,25 @@
+LOAD MODULE FROM "./libirf.so"
+FUNCTIONS (
+    mydiv(a:int, b:int) -> double,
+    mulvec(a:int, b:vecfloat) -> vecfloat,
+    newtree(height:int, f:int64, sparse:vecint, forget:double, maxF:int64, noClasses:int64, e:int, r:int64, rb:int64) -> bool,
+    additem(X:vecdouble, y:int64, size:int64) -> bool,
+    fit() -> bool,
+    predict() -> vecint
+);
+
+select mydiv(2,3);
+create table tb(x int);
+create table tb2(x double, y double, z double);
+insert into tb values (0);
+insert into tb values (0);
+insert into tb values (0);
+select newtree(5, 3, tb.x, 0, 3, 2, 0, 100, 1) from tb;
+insert into tb2 values (1, 0, 1);
+insert into tb2 values (0, 1, 1);
+insert into tb2 values (1, 1, 1);
+select additem(tb2.x, 1, 3) from tb2;
+select additem(tb2.y, 0, -1) from tb2;
+select additem(tb2.z, 1, -1) from tb2;
+select fit();
+select predict();