Return 0 on success in getvcp/setvcp

[jtai]

The getVcp and setVcp methods return the boolean results of the underlying API calls, which causes the program to exit 1 on success and 0 on failure. Typically 0 indicates success, so here's a small change to return the appropriate exit codes.

Due to the encoding of the .cpp file, git seems to think it's binary, so unfortunately the diff doesn't appear correctly. I've reproduced the diff below for easier review:

diff --git a/winddcutil/winddcutil.cpp b/winddcutil/winddcutil.cpp
index 6042067..9bc33ec 100644
--- a/winddcutil/winddcutil.cpp
+++ b/winddcutil/winddcutil.cpp
@@ -121,14 +121,14 @@ int getVcp(std::vector<std::string> args) {
        bool success = GetVCPFeatureAndVCPFeatureReply(physicalMonitorHandle, vcpCode, NULL, &currentValue, NULL);
        if (!success) {
                std::cerr << "Failed to get the vcp code value" << std::endl;
-               return success;
+               return 1;^M
        }

        std::stringstream ss;
        ss << std::hex << currentValue;
        std::cout << "VCP " << args[1] << " " << ss.str() << std::endl;

-       return success;
+       return 0;^M
 }

 int setVcp(std::vector<std::string> args) {
@@ -156,9 +156,11 @@ int setVcp(std::vector<std::string> args) {
        }

        bool success = SetVCPFeature(physicalMonitors[displayId].hPhysicalMonitor, vcpCode, newValue);
-       if (!success)
+       if (!success) {^M
                std::cerr << "Failed to set vcp feature" << std::endl;
-       return success;
+               return 1;^M
+       }^M
+       return 0;^M
 }

 std::unordered_map<std::string, std::function<int(std::vector<std::string>)>> commands

[scottaxcell]

Looks good, thanks for the improvement!

[jtai]

I rebased against your latest commit 961d857ece2faba1b59ba3faa412f0f45ae51fe0 to resolve the merge conflict.