shithub: openh264

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Check for an already defined nullptr macro

In addition to the existing compiler version/feature checks, also
check if there is such a macro.

This avoids warnings when building with Xcode 6.0.

--- a/module/gmp-openh264.cpp

+++ b/module/gmp-openh264.cpp

@@ -62,7 +62,10 @@

 #endif

 // This is for supporting older versions which do not have support for nullptr.

-#if defined(__clang__)

+#if defined(nullptr)

+# define GMP_HAVE_NULLPTR

+

+#elif defined(__clang__)

 # ifndef __has_extension

 # define __has_extension __has_feature

 # endif