Only unsigned values can be passed to the isspace function.

intorr · intorr · commit 54ccc739010b · 2017-12-08T15:00:13.000+05:00
diff --git a/src/xrGame/ui/UILines.cpp b/src/xrGame/ui/UILines.cpp
@@ -210,7 +210,7 @@ void CUILines::ParseText(bool force)
             {
                 bool b_last_ch = (idx == sub_len - 1);
 
-                if (isspace(sbl.m_text[idx]))
+                if (isspace((unsigned char)sbl.m_text[idx]))
                     last_space_idx = idx;
 
                 float w1 = get_str_width(m_pFont, sbl.m_text[idx]);

Original file line number	Diff line number	Diff line change
`@@ -210,7 +210,7 @@ void CUILines::ParseText(bool force)`
`210`	`210`	`{`
`211`	`211`	`bool b_last_ch = (idx == sub_len - 1);`
`212`	`212`
`213`		`- if (isspace(sbl.m_text[idx]))`
	`213`	`+ if (isspace((unsigned char)sbl.m_text[idx]))`
`214`	`214`	`last_space_idx = idx;`
`215`	`215`
`216`	`216`	`float w1 = get_str_width(m_pFont, sbl.m_text[idx]);`