Move line width addition in next_wrap to be after switch block

There is no overlap in side effects between this line and the switch
statement after it, but it did result in adding the width of a final
null terminator or newline to the width of the current line, which is
a waste because those widths both 1) require trying to find
non-existent characters in the font and 2) will not be used.

I found this out because I added a debug print in find_glyphinfo(), and
something was requesting lots of codepoint 0 from the font.

desktop_version/src/Font.cpp

@@ -798,8 +798,6 @@ static bool next_wrap(
             goto next;
         }
 
-        linewidth += get_advance(f, str[idx]);
-
         switch (str[idx])
         {
         case ' ':
@@ -817,6 +815,8 @@ static bool next_wrap(
             return true;
         }
 
+        linewidth += get_advance(f, str[idx]);
+
         if (linewidth > maxwidth)
         {
             if (lenfromlastspace != 0)