Fix compilation with GCC15

Author: ConiKost

ais_charset.c

@@ -1,3 +1,3 @@
 #include "ais_charset.h"
 
-char ais_charset[64] = "@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_ !\"#$%&'()*+,-./0123456789:;<=>?";
+char ais_charset[66] = "@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_ !\"#$%&'()*+,-./0123456789:;<=>?";

ais_charset.h

@@ -1,6 +1,6 @@
 #ifndef AIS_CHARSET_H
 #define AIS_CHARSET_H
 
-extern char ais_charset[64];
+extern char ais_charset[66];
 
 #endif

interactive.c

@@ -140,7 +140,7 @@ void interactiveShowData(void) {
     static bool need_clear = true;
     uint64_t now = mstime();
     char progress;
-    char spinner[4] = "|/-\\";
+    char spinner[5] = "|/-\\";
     int valid = 0;
     double signalMax = -100.0;
     double signalMin = +100.0;