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-rw-r--r--RichString.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/RichString.c b/RichString.c
index 1d2a3fee..790c15a9 100644
--- a/RichString.c
+++ b/RichString.c
@@ -86,7 +86,7 @@ static inline void RichString_writeFrom(RichString* this, int attrs, const char*
int newLen = from + len;
RichString_setLen(this, newLen);
for (int i = from, j = 0; i < newLen; i++, j++) {
- this->chptr[i] = (data_c[j] >= 32 ? data_c[j] : '?') | attrs;
+ this->chptr[i] = (((unsigned char)data_c[j]) >= 32 ? ((unsigned char)data_c[j]) : '?') | attrs;
}
this->chptr[newLen] = 0;
}