Update sixdraw and tcsgrep.

examples/sixdraw.c

@@ -211,6 +211,7 @@ init(struct sixdraw_ctx *ctx, int argc, char **argv)
                 break;
             case '?':
             default:
+                fprintf(ctx->out_file, "%s\n", "Usage: sixdraw [-t timeout] [-c line-color]");
                 return false;
         }
     }

tests/tcsgrep.c

@@ -195,7 +195,7 @@ main(int argc, char **argv)
                 break;
             case '?':
             default:
-                print_error(&ctx, "invalid arguments");
+                fprintf(ctx.out_file, "%s\n", "Usage: tcsgrep [-t timeout] [-l limit] [-pv]");
                 return 1;
         }
     }
@@ -366,11 +366,7 @@ main(int argc, char **argv)
         DEFSEQ_NOARGS(KEY_F12),
     };
     size_t npatterns = sizeof(seqs) / sizeof(struct tcsgrep_sequence);
-    char const **patterns = malloc(sizeof(char const *) * npatterns);
-    if (patterns == NULL) {
-        print_error(&ctx, "failed to allocate memory");
-        return 1;
-    }
+    char const *patterns[npatterns];
     for (size_t idx = 0; idx < npatterns; ++idx) {
         patterns[idx] = seqs[idx].pattern;
     }