Fix lingering switch statement test failures.

pkg/compiler/lib/src/ssa/switch_continue_analysis.dart

Index: pkg/compiler/lib/src/ssa/switch_continue_analysis.dart
diff --git a/pkg/compiler/lib/src/ssa/switch_continue_analysis.dart b/pkg/compiler/lib/src/ssa/switch_continue_analysis.dart
index ea06f8b36c637d6e13ee71459c98a11ed132e6a1..e11b8f44220361b370960b37cec0f6fd011406a4 100644
--- a/pkg/compiler/lib/src/ssa/switch_continue_analysis.dart
+++ b/pkg/compiler/lib/src/ssa/switch_continue_analysis.dart
@@ -57,12 +57,8 @@ class SwitchContinueAnalysis extends ir.Visitor<bool> {
   }
 
   bool visitIfStatement(ir.IfStatement ifStatement) {
-    if (ifStatement.then.accept(this)) {
-      if (ifStatement.otherwise != null) {
-        return ifStatement.otherwise.accept(this);
-      }
-    }
-    return false;
+    return ifStatement.then.accept(this) ||
+        (ifStatement.otherwise != null && ifStatement.otherwise.accept(this));
   }
 
   bool visitTryCatch(ir.TryCatch tryCatch) {