Refactor: C: Compute and use value_type early

Author: ubaidsk

src/libasr/codegen/asr_to_c.cpp

@@ -1133,10 +1133,10 @@ R"(
         }
         for (size_t i=0; i<x.n_values; i++) {
             this->visit_expr(*x.m_values[i]);
-            if( ASRUtils::is_array(ASRUtils::expr_type(x.m_values[i])) ) {
+            ASR::ttype_t* value_type = ASRUtils::expr_type(x.m_values[i]);
+            if( ASRUtils::is_array(value_type) ) {
                 src += "->data";
             }
-            ASR::ttype_t* value_type = ASRUtils::expr_type(x.m_values[i]);
             if (value_type->type == ASR::ttypeType::List ||
                 value_type->type == ASR::ttypeType::Tuple) {
                 tmp_gen += "\"";