close all open file handles when one of them fail to open

git-svn-id: https://svn.code.sf.net/p/nsis/code/NSIS/trunk@3649 212acab6-be3b-0410-9dea-997c60f758d6

Contrib/VPatch/Source/Plugin/vpatchdll.c

@@ -56,6 +56,7 @@ void __declspec(dllexport) vpatchfile(HWND hwndParent, int string_size,
     hSource = CreateFile(source, GENERIC_READ, FILE_SHARE_READ, NULL,
                                         OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0);
     if (hSource == INVALID_HANDLE_VALUE) {
+      CloseHandle(hPatch);
       pushstring("Unable to open source file");
       return;
     }
@@ -63,6 +64,8 @@ void __declspec(dllexport) vpatchfile(HWND hwndParent, int string_size,
     hDest = CreateFile(dest, GENERIC_READ | GENERIC_WRITE, 0, NULL,
                                     CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, 0);
     if (hDest == INVALID_HANDLE_VALUE) {
+      CloseHandle(hPatch);
+      CloseHandle(hSource);
       pushstring("Unable to open output file");
       return;
     }