Assert on BarMeterMode_characters length

The number of items of a Meter can exceed the length of
BarMeterMode_characters array. (The CPU Meter is an example.)
Item numbers exceeding the length are unplottable in a bar.
Add an assertion to note the fact.

Signed-off-by: Kang-Che Sung <explorer09@gmail.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/Meter.c b/Meter.c
index 07b88c0a..118eef91 100644
--- a/Meter.c
+++ b/Meter.c
@@ -238,6 +238,7 @@ static void BarMeterMode_draw(Meter* this, int x, int y, int w) {
       for (int j = offset; j < nextOffset; j++)
          if (RichString_getCharVal(bar, startPos + j) == ' ') {
             if (CRT_colorScheme == COLORSCHEME_MONOCHROME) {
+               assert(i < strlen(BarMeterMode_characters));
                RichString_setChar(&bar, startPos + j, BarMeterMode_characters[i]);
             } else {
                RichString_setChar(&bar, startPos + j, '|');