Fix crash on windows

Author: mittorn

engine/common/launcher.c

@@ -49,7 +49,7 @@ int __stdcall WinMain(HINSTANCE hInst, HINSTANCE hPrevInst, LPSTR cmdLine, int n
 	char **szArgv;
 	LPWSTR* lpArgv = CommandLineToArgvW(GetCommandLineW(), &szArgc);
 	int size, i = 0;
-	szArgv = (char**)malloc(szArgc*sizeof(char*));
+	szArgv = (char**)сalloc(szArgc + 1,sizeof(char*));
 	for (; i < szArgc; ++i)
 	{
 		size = wcslen(lpArgv[i]) + 1;

engine/common/system.c

@@ -489,7 +489,11 @@ qboolean _Sys_GetParmFromCmdLine( char *parm, char *out, size_t size )
 	if( !argc ) return false;
 	if( !out ) return false;
 	if( !host.argv[argc + 1] ) return false;
-	Q_strncpy( out, host.argv[argc+1], size );
+	if( argc < 0 || argc >= host.argc ) return false;
+	if( argc + 1 == host.argc )
+		Q_strncpy( out, "", size );
+	else
+		Q_strncpy( out, host.argv[argc+1], size );
 
 	return true;
 }

game_launch/xash.c

@@ -180,7 +180,7 @@ int __stdcall WinMain( HINSTANCE hInst, HINSTANCE hPrevInst, LPSTR cmdLine, int
 	int ret, i;
 
 	lpArgv = CommandLineToArgvW( GetCommandLineW(), &szArgc );
-	szArgv = ( char** )malloc( szArgc * sizeof( char* ));
+	szArgv = ( char** )сalloc( szArgc + 1, sizeof( char* ));
 
 	for( i = 0; i < szArgc; ++i )
 	{