Enlarged extension availability array to make room for even more.

src/Magnum/Context.h

@@ -470,8 +470,8 @@ class MAGNUM_EXPORT Context {
         Flags _flags;
         #endif
 
-        std::array<Version, 160> _extensionRequiredVersion;
-        std::bitset<160> _extensionStatus;
+        std::array<Version, 256> _extensionRequiredVersion;
+        std::bitset<256> _extensionStatus;
         std::vector<Extension> _supportedExtensions;
 
         Implementation::State* _state;

src/Magnum/Extensions.h

@@ -228,7 +228,7 @@ namespace GL {
         _extension(GL,NV,conditional_render,            GL210, GL300) // #346
         /* NV_draw_texture not supported */                           // #430
     }
-    /* IMPORTANT: if this line is > 233 (73 + size), don't forget to update array size in Context.h */
+    /* IMPORTANT: if this line is > 329 (73 + size), don't forget to update array size in Context.h */
     #elif defined(MAGNUM_TARGET_WEBGL)
     #line 1
     namespace ANGLE {