Fix fg.deobf source not loading (#746)

* Fix fg.deobf source not loading

* Fix fg.deobf source not loading

Author: IzzelAliz

src/userdev/java/net/minecraftforge/gradle/userdev/util/DeobfuscatingRepo.java

@@ -126,12 +126,8 @@ private File findRaw(Artifact artifact, String mapping) throws IOException {
     }
 
     private File findSource(Artifact artifact, String mapping) throws IOException {
-        Optional<File> orig = findArtifactFile(artifact);
-        if (!orig.isPresent()) {
-            return null;
-        }
-
-        File origFile = orig.get();
+        File origFile = MavenArtifactDownloader.manual(project, artifact.getDescriptor(), false);
+        if (origFile == null) return null;
 
         return deobfuscator.deobfSources(origFile, mapping, getArtifactPath(artifact, mapping));
     }

src/userdev/java/net/minecraftforge/gradle/userdev/util/Deobfuscator.java

@@ -158,7 +158,7 @@ public File deobfSources(File original, String mappings, String... cachePath) th
         if (!cache.isSame() || !output.exists()) {
             McpNames map = McpNames.load(names);
 
-            try (ZipInputStream zin = new ZipInputStream(new FileInputStream(input));
+            try (ZipInputStream zin = new ZipInputStream(new FileInputStream(original));
                  ZipOutputStream zout = new ZipOutputStream(new FileOutputStream(output))) {
                 ZipEntry _old;
                 while ((_old = zin.getNextEntry()) != null) {