Xserver: fix potential crash
* dix/extension.c: (AddExtensionAlias): don't crash when failed to add extension alias.
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@ -184,6 +184,8 @@ _X_EXPORT Bool AddExtensionAlias(char *alias, ExtensionEntry *ext)
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char *name;
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char **aliases;
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if (!ext)
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return FALSE ;
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aliases = (char **)xrealloc(ext->aliases,
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(ext->num_aliases + 1) * sizeof(char *));
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if (!aliases)
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