Bug 1135535 part 2 - Fix C4067 unexpected token in js/src and mark this warning an error on MSVC. r=luke

Fix warning:
js/src/frontend/Parser.cpp(2571) : error C4067: unexpected tokens following preprocessor directive - expected a newline

--HG--
extra : rebase_source : 306de2dd08d4ae6cd5cd2c3d98253834af30e91d
extra : source : a92c239aab4f18bed4df0f5581152862c5e75740

js/src/frontend/Parser.cpp

@@ -2568,7 +2568,7 @@ Parser<ParseHandler>::functionArgsAndBodyGeneric(Node pn, HandleFunction fun, Fu
         }
         funbox->bufEnd = pos().begin + 1;
     } else {
-#if not JS_HAS_EXPR_CLOSURES
+#if !JS_HAS_EXPR_CLOSURES
         MOZ_ASSERT(kind == Arrow);
 #endif
         if (tokenStream.hadError())

js/src/moz.build

@@ -498,6 +498,7 @@ if CONFIG['_MSC_VER']:
     # But given the conversion from bool is specified, and this is a
     # pattern widely used in code in js/src, suppress this warning here.
     CXXFLAGS += ['-wd4805']
+    CXXFLAGS += ['-we4067']
 
 if CONFIG['OS_ARCH'] not in ('WINNT', 'HP-UX'):
     OS_LIBS += [