Make sure to null terminate argument lists!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20166 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/gccld/GenerateCode.cpp b/tools/gccld/GenerateCode.cpp
index b189d06..1d4c520 100644
--- a/tools/gccld/GenerateCode.cpp
+++ b/tools/gccld/GenerateCode.cpp
@@ -247,6 +247,7 @@
   args.push_back("-o");
   args.push_back(OutputFilename.c_str());
   args.push_back(InputFilename.c_str());
+  args.push_back(0);
 
   return sys::Program::ExecuteAndWait(llc, &args[0]);
 }
@@ -263,6 +264,7 @@
   args.push_back("-o");
   args.push_back(OutputFile.c_str());
   args.push_back(InputFile.c_str());
+  args.push_back(0);
   return sys::Program::ExecuteAndWait(llc, &args[0]);
 }
 
@@ -322,6 +324,7 @@
       args.push_back(Libraries[index].c_str());
     }
   }
+  args.push_back(0);
 
   // Run the compiler to assembly and link together the program.
   return sys::Program::ExecuteAndWait(gcc, &args[0], (const char**)clean_env);