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Check whether locales are the empty string and ignore them if they are.
This fixes a confusing error in compiling the xkb compose table if LC_ALL, LC_CTYPE, or LANG are set to the empty string.
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@ -1682,11 +1682,11 @@ static void keyboardHandleKeymap(void* userData,
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// Look up the preferred locale, falling back to "C" as default.
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locale = getenv("LC_ALL");
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if (!locale)
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if (!locale || strlen(locale) == 0)
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locale = getenv("LC_CTYPE");
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if (!locale)
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if (!locale || strlen(locale) == 0)
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locale = getenv("LANG");
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if (!locale)
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if (!locale || strlen(locale) == 0)
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locale = "C";
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composeTable =
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