OpenGLGraphicsContext: Avoid warning about non-constexpr function call in implicitly-constexpr constructor with GCC 16

Author: reuk

modules/juce_opengl/opengl/juce_OpenGLGraphicsContext.cpp

@@ -955,7 +955,7 @@ class SavedBinding
         GLuint current{};
     };
 
-    Values values = []
+    static Values getInitialValues()
     {
         if (! Traits::predicate())
             return Values{};
@@ -968,7 +968,9 @@ class SavedBinding
         Traits::bind (current);
 
         return Values { previous, current };
-    }();
+    }
+
+    Values values = getInitialValues();
 };
 
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