CHAR_SPECIAL_F7 constant

Preface for string decompilation

include/text.h

@@ -65,6 +65,7 @@
 #define CHAR_x              0xEC
 #define CHAR_y              0xED
 #define CHAR_z              0xEE
+#define CHAR_SPECIAL_F7     0xF7
 #define CHAR_SPECIAL_F9     0xF9
 #define CHAR_COLON          0xF0
 #define CHAR_PROMPT_SCROLL  0xFA // waits for button press and scrolls dialog

src/unk_text_util.c

@@ -32,7 +32,7 @@ u8 *UnkTextUtil_StringExpandPlaceholders(u8 *dest, const u8 *src)
 {
     while (*src != EOS)
     {
-        if (*src != 0xF7)
+        if (*src != CHAR_SPECIAL_F7)
         {
             *dest++ = *src++;
         }