fix: prevent segfault in case ispell does not provide any output

README.md

@@ -17,7 +17,7 @@ zig build -Doptimize=ReleaseFast
 If you wish to install it into */usr/local/* you will have to provide the prefix argument:
 
 ```sh
-sudo zig build install -p /usr/local/ -DoptimizeReleaseFast
+sudo zig build install -p /usr/local/ -Doptimize=ReleaseFast
 ```
 
 This was build using zig 0.12.0.dev but should work with the most recent version of zig.

src/main.zig

@@ -85,6 +85,12 @@ pub fn main() !void {
     }
     std.mem.copy(u8, content, output[start_idx .. output.len - 1]);
     defer allocator.free(content);
+    // prevent access to result if the ispell output has only a single line
+    if (output.len - start_idx > 0) {
+        try stdout_writer.print("{s}", .{word});
+        try bw.flush(); // don't forget to flush!
+        return;
+    }
 
     if (content[0] == '*' or content[0] == '+') {
         // given word was correct so just return the input as no replacement is necessary