COMMON: update const error message

Author: chrisws

samples/distro-examples/tests/output/trycatch.out

@@ -14,7 +14,6 @@ Stack:
  IF: 193
  IF: 192
  SUB: 216
-
 
 
  * RTE-ERROR AT ../../../samples/distro-examples/tests/trycatch.bas:200 * 

src/common/sberr.c

@@ -179,11 +179,11 @@ void err_argerr(void) {
 }
 
 void err_varisarray(void) {
-  rt_raise(EVAL_VAR_IS_ARRAY);
+  err_throw(EVAL_VAR_IS_ARRAY);
 }
 
 void err_varisnotarray(void) {
-  rt_raise(EVAL_VAR_IS_NOT_ARRAY);
+  err_throw(EVAL_VAR_IS_NOT_ARRAY);
 }
 
 void err_vararridx(int i, int m) {

src/languages/messages.en.h

@@ -172,7 +172,7 @@
 #define EVAL_TYPE               "Expr/RT: Type mismatch"
 #define EVAL_PARAM              "Expr/RT: Invalid parameter"
 #define ERR_UNSUPPORTED         "Unsupported"
-#define ERR_CONST               "LET: Cannot change a constant"
+#define ERR_CONST               "LET: Cannot change a constant (CONST always has global scope)"
 #define ERR_NOT_A_VAR           "Not a variable"
 #define ERR_NOT_ARR_OR_FUNC     "NOT an array OR function"
 #define ERR_RANGE               "Out of range"