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fix assertion when analyzing spam with japanese characters, for example, sr=mscott 251882
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@ -273,7 +273,7 @@ static PRBool isDecimalNumber(const char* word)
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if (*p == '-') ++p;
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char c;
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while ((c = *p++)) {
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if (!isdigit(c))
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if (!isdigit((unsigned char) c))
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return PR_FALSE;
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}
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return PR_TRUE;
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