MinGW: Fix SEGV

Running the following command in ./sakura_core causes SEGV:
```
sakura.exe StdAfx.h -MTYPE=js -M="Down();Up();Right();Left();ShowFunckey();ShowMiniMap();ShowTab();SelectAll();GoFileEnd();GoFileTop();ShowFunckey();ShowMiniMap();ShowTab();ExitAll();"
```

This fixes it.

Related:
sakura-editor#1363 (comment), sakura-editor#601, sakura-editor#1372

sakura_core/view/CEditView_Paint_Bracket.cpp

@@ -321,7 +321,7 @@ bool CEditView::SearchBracket(
 	CLogicPoint ptPos;
 
 	m_pcEditDoc->m_cLayoutMgr.LayoutToLogic( ptLayout, &ptPos );
-	const wchar_t *cline = m_pcEditDoc->m_cDocLineMgr.GetLine(ptPos.GetY2())->GetDocLineStrWithEOL(&len);
+	const wchar_t *cline = CDocLine::GetDocLineStrWithEOL_Safe(m_pcEditDoc->m_cDocLineMgr.GetLine(ptPos.GetY2()), &len);
 
 	//	Jun. 19, 2000 genta
 	if( cline == NULL )	//	最後の行に本文がない場合