Fix toString for FixedPoint instances with 0 decimals (#1472)

* Fix `toString` for instances with 0 decimals

* Rebuild

* Add changeset

Author: ryangoree

.changeset/real-files-whisper.md

@@ -0,0 +1,5 @@
+---
+"@delvtech/fixed-point-wasm": patch
+---
+
+Fix `toString()` for instances with `0` decimals.

crates/fixed-point-wasm/src/lib.rs

@@ -344,8 +344,17 @@ impl WasmFixedPoint {
     /// Get the decimal string representation of this fixed-point number.
     #[wasm_bindgen(skip_jsdoc, js_name = toString)]
     pub fn to_string(&self) -> String {
-        let decimals_delta = INNER_DECIMALS - self.decimals;
         let str = self.inner.to_string();
+
+        // If there are no decimals, return the integer part only.
+        if self.decimals == 0 {
+            return str.split('.').next().unwrap_or_default().to_string();
+        }
+
+        let decimals_delta = INNER_DECIMALS - self.decimals;
+        if decimals_delta == 0 {
+            return str;
+        }
         str[..str.len() - decimals_delta as usize].to_string()
     }