LifetimeDependence: fix a type checker crash on implicit init

When the type checker diagnoses an error on an implicit initializer,
return immediately before handling its parameter to avoid an assert.

(cherry picked from commit e9ac803)

Author: atrick

lib/AST/LifetimeDependence.cpp

@@ -962,7 +962,7 @@ class LifetimeDependenceChecker {
         diagnose(returnLoc,
                  diag::lifetime_dependence_cannot_infer_scope_ownership,
                  param->getParameterName().str(), diagnosticQualifier());
-        continue;
+        return;
       }
       targetDeps = std::move(targetDeps).add(paramIndex, *kind);
     }

test/Sema/lifetime_depend_infer.swift

@@ -168,6 +168,12 @@ struct EscapableNonTrivialSelf {
 // (for initializers and stand-alone functions)
 // =============================================================================
 
+// An implicit initializer illegally consumes its nontrivial parameter.
+public struct NonescapableImplicitInitializer: ~Escapable {
+  // expected-error @-1{{cannot borrow the lifetime of 'c', which has consuming ownership on an implicit initializer}}
+  var c: C
+}
+
 struct NonescapableInitializers: ~Escapable {
   var c: C