Tweak default colors to not fail on transparent images

main.c

@@ -37,7 +37,7 @@ unsigned int nearest_power_of_2(unsigned int n) {
 struct options {
     uint32_t r;
     int s;
-    uint8_t c;
+    uint16_t c;
     int o;
     int l;
     int w;
@@ -94,7 +94,7 @@ void printNoFrames() { printf("You need to specify at least one frame to use, go
 
 int main(const int argc, char *argv[]) {
     printf(
-        "Knowledge Adventure Worlds Easy Avatar Tool, version 1.1\n"
+        "Knowledge Adventure Worlds Easy Avatar Tool, version 1.1.1\n"
            "Copyright (c) 2025 Brett \"bonkmaykr\" Bergstrom\n"
            "This program is free software under the MIT license.\n"
            "\n"
@@ -113,7 +113,7 @@ int main(const int argc, char *argv[]) {
     struct options opt;
     opt.r = 0;
     opt.s = 0;
-    opt.c = 255;
+    opt.c = 0xDEAD;
     opt.o = 0;
     opt.l = 0;
     opt.w = 0;
@@ -147,7 +147,7 @@ int main(const int argc, char *argv[]) {
         } else if (strcmp(argv[i], "-c") == 0) {
             if (i == argc-1) { printf("No parameter for option: -c\n"); return 0; }
             const int c = trunc(atof(argv[i+1]));
-            if (c < 1 || c > 256) { printf("Invalid number of colors: %s\n", argv[i+1]); return 0; }
+            if (c < 1 || c > 256 - (!opt.o)) { printf("Invalid number of colors: %s\nThe maximum palette size is 255 for transparent MOVs and 256 for opaque ones.\n", argv[i+1]); return 0; }
             opt.c = c - 1;
             i++;
         } else if (strcmp(argv[i], "-d") == 0) {
@@ -159,6 +159,7 @@ int main(const int argc, char *argv[]) {
         i++;
     }
     if (numFrames == 0) { printNoFrames(); return 0; }
+    if (opt.c == 0xDEAD) { if (opt.o) opt.c = 254; else opt.c = 255; }
 
     if (MagickReadImage(mw, frames[0]) == MagickFalse) { printf("ERROR trying to read %s\n", frames[0]); return 0;}
     MagickSetImageFormat(mw, "BMP3");
@@ -365,6 +366,7 @@ int main(const int argc, char *argv[]) {
             i++;
         }
     }
+    remove("segments.txt");
 
     printf("\n\n!!! DONE !!!\n");
     if (opt.d)