Fix error

Author: jfecher

compiler/noirc_evaluator/src/ssa/checks/check_for_underconstrained_values.rs

@@ -314,7 +314,7 @@ impl DependencyContext {
                                 self.update_children(&arguments, &results);
                             }
                         },
-                        Value::Function(callee) => match all_functions[callee].runtime() {
+                        Value::Function(callee) => match all_functions[&callee].runtime() {
                             RuntimeType::Brillig(_) => {
                                 // Record arguments/results for each Brillig call for the check
                                 self.tainted.insert(
@@ -590,7 +590,7 @@ impl Context {
                                 self.value_sets.push(instruction_arguments_and_results);
                             }
                         },
-                        Value::Function(callee) => match all_functions[callee].runtime() {
+                        Value::Function(callee) => match all_functions[&callee].runtime() {
                             RuntimeType::Brillig(_) => {
                                 // For calls to Brillig functions we memorize the mapping of results to argument ValueId's and InstructionId's
                                 // The latter are needed to produce the callstack later