Make RUNTIME_ASSERT have more useful output in debug mode

src/runtime/runtime-internal.cc

Index: src/runtime/runtime-internal.cc
diff --git a/src/runtime/runtime-internal.cc b/src/runtime/runtime-internal.cc
index 0ca2e84d3dbc62d9a214e0085041e64c77a93792..34b844a8984aa9dbbc1ec17e7d48e9b9f633079c 100644
--- a/src/runtime/runtime-internal.cc
+++ b/src/runtime/runtime-internal.cc
@@ -317,7 +317,6 @@ RUNTIME_FUNCTION(Runtime_FormatMessageString) {
   return *result;
 }
 
-
 #define CALLSITE_GET(NAME, RETURN)                          \
   RUNTIME_FUNCTION(Runtime_CallSite##NAME##RT) {            \
     HandleScope scope(isolate);                             \
@@ -325,7 +324,7 @@ RUNTIME_FUNCTION(Runtime_FormatMessageString) {
     CONVERT_ARG_HANDLE_CHECKED(JSObject, call_site_obj, 0); \
     Handle<String> result;                                  \
     CallSite call_site(isolate, call_site_obj);             \
-    RUNTIME_ASSERT(call_site.IsValid())                     \
+    RUNTIME_ASSERT(call_site.IsValid());                    \
     return RETURN(call_site.NAME(), isolate);               \
   }