There is an echo in here

Marlin/Marlin.h

 
 #define SERIAL_ECHOPAIR(name,value) do{ serial_echopair_P(PSTR(name),(value)); }while(0)
 
+void serial_echopair_P(const char *s_P, int v);
+void serial_echopair_P(const char *s_P, long v);
 void serial_echopair_P(const char *s_P, float v);
 void serial_echopair_P(const char *s_P, double v);
 void serial_echopair_P(const char *s_P, unsigned long v);

Marlin/Marlin_main.cpp

 
 bool setTargetedHotend(int code);
 
+void serial_echopair_P(const char *s_P, int v)           { serialprintPGM(s_P); SERIAL_ECHO(v); }
+void serial_echopair_P(const char *s_P, long v)          { serialprintPGM(s_P); SERIAL_ECHO(v); }
 void serial_echopair_P(const char *s_P, float v)         { serialprintPGM(s_P); SERIAL_ECHO(v); }
 void serial_echopair_P(const char *s_P, double v)        { serialprintPGM(s_P); SERIAL_ECHO(v); }
 void serial_echopair_P(const char *s_P, unsigned long v) { serialprintPGM(s_P); SERIAL_ECHO(v); }