[irgen] Fix decl context of global ghost declarations

framaCIRGen_src/ACSLComment.cpp

@@ -287,6 +287,7 @@ void ACSLComment::parseGhostGlobal(
   while (!parser->ParseTopLevelDecl(Decl)) {
 #endif
     clang::DeclGroupRef DGR = Decl.get();
+    for (auto decl: DGR) decl->setDeclContext(clangContext);
     consumer->HandleTopLevelDecl(DGR);
   }
   cpp.enableIncrementalProcessing(false);