fix undefined behaviours and jpeg crash on non-windows platforms

Author: nillerusr

common/imageutils.cpp

@@ -65,9 +65,12 @@ extern void longjmp( jmp_buf, int ) __attribute__((noreturn));
 #define JPEGLIB_USE_STDIO
 #if ANDROID
 #include "android/jpeglib/jpeglib.h"
-#else
+#elif defined WIN32
 #include "jpeglib/jpeglib.h"
+#else
+#include <jpeglib.h>
 #endif
+
 #undef JPEGLIB_USE_STDIO
 
 

filesystem/basefilesystem.cpp

@@ -4203,7 +4203,7 @@ bool CBaseFileSystem::FindNextFileInVPKOrPakHelper( FindData_t *pFindData )
 	{
 		V_strncpy( pFindData->findData.cFileName, V_UnqualifiedFileName( pFindData->m_fileMatchesFromVPKOrPak[0] ), sizeof( pFindData->findData.cFileName ) );
 		pFindData->findData.dwFileAttributes = 0;
-		delete pFindData->m_fileMatchesFromVPKOrPak.Head();
+		delete[] pFindData->m_fileMatchesFromVPKOrPak.Head();
 		pFindData->m_fileMatchesFromVPKOrPak.RemoveMultipleFromHead( 1 );
 
 		return true;

vgui2/vgui_controls/FileOpenDialog.cpp

@@ -1500,6 +1500,9 @@ void FileOpenDialog::OnOpen()
 	char pFileName[MAX_PATH];
 	GetSelectedFileName( pFileName, sizeof( pFileName ) );
 
+	if( !pFileName[0] )
+		return;
+
 	int nLen = Q_strlen( pFileName );
 	bool bSpecifiedDirectory = ( pFileName[nLen-1] == '/' || pFileName[nLen-1] == '\\' ) && (!IsOSX() || ( IsOSX() && !Q_stristr( pFileName, ".app" ) ) );
 	Q_StripTrailingSlash( pFileName );

wscript

@@ -239,9 +239,9 @@ def define_platform(conf):
 			'_DLL_EXT=.so'
 		])
 
-#	if conf.env.DEST_OS != 'win32':
+	if conf.env.DEST_OS != 'win32':
+		conf.define('NO_MEMOVERRIDE_NEW_DELETE', 1)
 #		conf.define('NO_MALLOC_OVERRIDE', 1)
-#		conf.define('NO_MEMOVERRIDE_NEW_DELETE', 1)
 
 	if conf.options.DEBUG_ENGINE:
 		conf.env.append_unique('DEFINES', [