Fix wasm32 builds

Author: josephlr

src/wasm32_bindgen.rs

@@ -79,13 +79,13 @@ fn getrandom_init() -> Result<RngSource, Error> {
     // we're in an older web browser and the OS RNG isn't available.
     let crypto = this.crypto();
     if crypto.is_undefined() {
-        return Err(Error::from_custom_error(CRYPTO_UNDEF));
+        return Err(Error::internal(BINDGEN_CRYPTO_UNDEF));
     }
 
     // Test if `crypto.getRandomValues` is undefined as well
     let crypto: BrowserCrypto = crypto.into();
     if crypto.get_random_values_fn().is_undefined() {
-        return Err(Error::from_custom_error(GRV_UNDEF));
+        return Err(Error::internal(BINDGEN_GRV_UNDEF));
     }
 
     // Ok! `self.crypto.getRandomValues` is a defined value, so let's

src/wasm32_stdweb.rs

@@ -69,7 +69,7 @@ fn getrandom_init() -> Result<RngSource, Error> {
     } else {
         let err: WebError = js! { return @{ result }.error }.try_into().unwrap();
         error!("getrandom unavailable: {}", err);
-        Err(Error::from_custom_error(NO_RNG_METHOD))
+        Err(Error::internal(STDWEB_NO_RNG))
     }
 }
 
@@ -105,7 +105,7 @@ fn getrandom_fill(source: RngSource, dest: &mut [u8]) -> Result<(), Error> {
         if js! { return @{ result.as_ref() }.success } != true {
             let err: WebError = js! { return @{ result }.error }.try_into().unwrap();
             error!("getrandom failed: {}", err);
-            return Err(Error::from_custom_error(METHOD_FAILED));
+            return Err(Error::internal(STDWEB_RNG_FAILED));
         }
     }
     Ok(())