Various small fixes

test/circuits/declareandistantiate.circom

@@ -0,0 +1,12 @@
+
+
+
+template A() {
+    signal a;
+}
+
+template B() {
+    component a[2] = A();
+}
+
+component main = B();

test/circuits/forvariables.circom

@@ -0,0 +1,19 @@
+template A() {
+    signal input in;
+    signal output out;
+
+    var acc = 0;
+    for (var i=0; i<3; i++) {
+        if (i==1) {
+            var accIn = 0;
+            for (var j=0; j<3; j++) {
+                accIn= accIn+1;
+            }
+            acc = acc + accIn;
+        }
+    }
+
+    out <== in + acc;
+}
+
+component main = A();

test/circuits/mixvarsignal.circom

@@ -0,0 +1,14 @@
+template X() {
+    signal input i;
+    signal output out;
+
+    var r = 0;
+    for (var n=0; n<i; n++) {
+        r++;
+    }
+
+    i === r;
+    out <== r;
+}
+
+component main = X();