translator: fix variable defenition via another variable

translator/src/main/kotlin/org/kotlinnative/translator/BlockCodegen.kt

@@ -911,7 +911,7 @@ abstract class BlockCodegen(val state: TranslationState, val variableManager: Va
 
         when (assignExpression) {
             is LLVMVariable -> {
-                if (assignExpression.pointer == 0) {
+                if (assignExpression.pointer < 2) {
                     val allocVar = variableManager.receiveVariable(identifier, assignExpression.type, LLVMRegisterScope(), pointer = 0)
                     codeBuilder.allocStackVar(allocVar)
                     allocVar.pointer++

translator/src/test/kotlin/tests/input/variables_assigment_1.txt

@@ -0,0 +1 @@
+variables_assigment_1_Int(56789) == 56789

translator/src/test/kotlin/tests/kotlin/variables_assigment_1.kt

@@ -0,0 +1,6 @@
+fun variables_assigment_1(x: Int): Int {
+    var z = x
+    z++
+    return x
+}
+