Enable more warnings on GCC and clang

BUG=angleproject:892

Change-Id: I74ca341f29b245f698d1e1ad43149a91db46817f
Reviewed-on: https://chromium-review.googlesource.com/271411
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Tested-by: Corentin Wallez <cwallez@chromium.org>
diff --git a/src/compiler/translator/InitializeVariables.h b/src/compiler/translator/InitializeVariables.h
index 4a81266..2e87611 100644
--- a/src/compiler/translator/InitializeVariables.h
+++ b/src/compiler/translator/InitializeVariables.h
@@ -26,8 +26,8 @@
     typedef TVector<InitVariableInfo> InitVariableInfoList;
 
     InitializeVariables(const InitVariableInfoList &vars)
-        : mCodeInserted(false),
-          mVariables(vars)
+        : mVariables(vars),
+          mCodeInserted(false)
     {
     }