Resolve -Wimplicit-int-conversion warnings

Panel.c:414:49: error: implicit conversion loses integer precision: 'int' to 'short' [-Werror,-Wimplicit-int-conversion]
      this->scrollH = MAXIMUM(this->selectedLen - this->w, 0);
                    ~         ~~~~~~~~~~~~~~~~~~^~~~~~~~~
./Macros.h:11:54: note: expanded from macro 'MAXIMUM'
#define MAXIMUM(a, b)                  ((a) > (b) ? (a) : (b))
                                                     ^

IncSet.c:159:38: error: implicit conversion loses integer precision: 'int' to 'char' [-Werror,-Wimplicit-int-conversion]
         mode->buffer[mode->index] = ch;
                                   ~ ^~

Panel.c:456:24: error: implicit conversion loses integer precision: 'int' to 'char' [-Werror,-Wimplicit-int-conversion]
         buffer[len] = ch;
                     ~ ^~
Panel.c:473:22: error: implicit conversion loses integer precision: 'int' to 'char' [-Werror,-Wimplicit-int-conversion]
         buffer[0] = ch;
                   ~ ^~

1 files changed, 1 insertions, 1 deletions

diff --git a/IncSet.c b/IncSet.c
index cee3565b..56f9c32f 100644
--- a/IncSet.c
+++ b/IncSet.c
@@ -156,7 +156,7 @@ bool IncSet_handleKey(IncSet* this, int ch, Panel* panel, IncMode_GetPanelValue
       doSearch = false;
    } else if (0 < ch && ch < 255 && isprint((unsigned char)ch)) {
       if (mode->index < INCMODE_MAX) {
-         mode->buffer[mode->index] = ch;
+         mode->buffer[mode->index] = (char) ch;
          mode->index++;
          mode->buffer[mode->index] = 0;
          if (mode->isFilter) {