Fixed bug that caused spurious "1" exit condition in gdisk. Also

modified Windows warning text in light of common use of GPT on Windows
8 and 8.1.

gdisk.cc

@@ -15,6 +15,7 @@ int main(int argc, char* argv[]) {
    GPTDataTextUI theGPT;
    string device = "";
    UnicodeString uString;
+   int isError = 0;
 
 #ifndef EFI
    cout << "GPT fdisk (gdisk) version " << GPTFDISK_VERSION << "\n\n";
@@ -49,16 +50,20 @@ int main(int argc, char* argv[]) {
             device = (string) argv[1];
          } else { // 3 arguments, but none is "-l"
             cerr << "Usage: " << argv[0] << " [-l] device_file\n";
+            isError = 1;
          } // if/elseif/else
          if (device != "") {
             theGPT.JustLooking();
             if (theGPT.LoadPartitions(device))
                theGPT.DisplayGPTData();
+            else
+               isError = 1;
          } // if
          break;
       default:
          cerr << "Usage: " << argv[0] << " [-l] device_file\n";
+         isError = 1;
          break;
    } // switch
-   return 1 ;
+   return (isError);
 } // main

support.cc

@@ -328,11 +328,11 @@ void ReverseBytes(void* theValue, int numBytes) {
 void WinWarning(void) {
    #ifdef _WIN32
    cout << "\a************************************************************************\n"
-   << "Most versions of Windows cannot boot from a GPT disk, and most varieties\n"
-   << "prior to Vista cannot read GPT disks. Therefore, you should exit now\n"
-   << "unless you understand the implications of converting MBR to GPT or creating\n"
-   << "a new GPT disk layout!\n"
-   << "************************************************************************\n\n";
+        << "Most versions of Windows cannot boot from a GPT disk except on a UEFI-based\n"
+        << "computer, and most varieties prior to Vista cannot read GPT disks. Therefore,\n"
+        << "you should exit now unless you understand the implications of converting MBR\n"
+        << "to GPT or creating a new GPT disk layout!\n"
+        << "************************************************************************\n\n";
    cout << "Are you SURE you want to continue? ";
    if (GetYN() != 'Y')
       exit(0);