Gvars screen tidy up

radio/src/strhelpers.h

@@ -37,6 +37,7 @@ char * strAppendStringWithIndex(char * dest, const char * s, int idx);
 char * getTimerString(char * dest, int32_t tme, uint8_t hours=0);
 char * getCurveString(char * dest, int idx);
 char * getGVarString(char * dest, int idx);
+char * getGVarString(int idx);
 char * getSwitchPositionName(char * dest, swsrc_t idx);
 char * getSwitchName(char * dest, swsrc_t idx);
 char * getSourceString(char * dest, mixsrc_t idx);