core: fix class renaming by source file info

jadx-core/src/main/java/jadx/core/deobf/Deobfuscator.java

@@ -211,8 +211,23 @@ public class Deobfuscator {
 	}
 
 	private String makeClsAlias(ClassNode cls) {
+		ClassInfo classInfo = cls.getClassInfo();
+		String alias = getAliasFromSourceFile(cls);
+		if (alias == null) {
+			String clsName = classInfo.getShortName();
+			alias = String.format("C%04d%s", clsIndex++, makeName(clsName));
+		}
+		PackageNode pkg = getPackageNode(classInfo.getPackage(), true);
+		clsMap.put(classInfo, new DeobfClsInfo(this, cls, pkg, alias));
+		return alias;
+	}
+
+	@Nullable
+	private String getAliasFromSourceFile(ClassNode cls) {
 		SourceFileAttr sourceFileAttr = cls.get(AType.SOURCE_FILE);
-		if (sourceFileAttr != null) {
+		if (sourceFileAttr == null) {
+			return null;
+		}
 		String name = sourceFileAttr.getFileName();
 		if (name.endsWith(".java")) {
 			name = name.substring(0, name.length() - ".java".length());
@@ -223,14 +238,7 @@ public class Deobfuscator {
 			cls.remove(AType.SOURCE_FILE);
 			return name;
 		}
-		}
-		ClassInfo classInfo = cls.getClassInfo();
-		String clsName = classInfo.getShortName();
-		String alias = String.format("C%04d%s", clsIndex++, makeName(clsName));
-
-		PackageNode pkg = getPackageNode(classInfo.getPackage(), true);
-		clsMap.put(classInfo, new DeobfClsInfo(this, cls, pkg, alias));
-		return alias;
+		return null;
 	}
 
 	@Nullable