fix(tool): romtool to handle nes/snes roms added

Author: kassane

build.zig

@@ -212,6 +212,19 @@ pub fn build(b: *std.Build) void {
     });
     b.installArtifact(svg2chr);
 
+    // Host tool: NES / SNES / PRG pack · unpack · disassemble.
+    const romtool = b.addExecutable(.{
+        .name = "romtool",
+        .root_module = b.createModule(.{
+            .root_source_file = b.path("tools/romtool.zig"),
+            .target = b.graph.host,
+            .optimize = .ReleaseSafe,
+        }),
+    });
+    b.installArtifact(romtool);
+    const romtool_step = b.step("romtool", "Build romtool (NES/SNES/PRG pack·unpack·disasm)");
+    romtool_step.dependOn(&romtool.step);
+
     // Host tool: 6502 simulator built from llvm-mos-sdk source (no prebuilt binary needed).
     const mos_sim = b.addExecutable(.{
         .name = "mos-sim",

snes/sneslib.zig

@@ -225,7 +225,6 @@ pub fn set_color_math(cgwsel: u8, cgadsub: u8) void {
     hw.CGADSUB.* = cgadsub;
 }
 
-
 /// OR multiple button constants together at comptime.
 /// Usage: `sneslib.buttonMask(.{sneslib.KEY_A, sneslib.KEY_B})`
 pub fn buttonMask(comptime btns: anytype) u16 {