Fix Framebuffer::checkStatus() on WebGL 1.

doc/changelog.dox

@@ -82,6 +82,8 @@ See also:
     strings. See the @cpp "emscripten-pthreads-broken-unicode-shader-sources" @ce
     workaround description for details.
 -   @ref Attribute::DataType::HalfFloat was not available on WebGL 2 by mistake
+-   A wrong code path for @ref Framebuffer::checkStatus() was selected on WebGL
+    1 by mistake
 
 @subsection changelog-latest-deprecated Deprecated APIs
 

src/Magnum/Implementation/FramebufferState.cpp

@@ -185,10 +185,8 @@ FramebufferState::FramebufferState(Context& context, std::vector<std::string>& e
     #ifndef MAGNUM_TARGET_WEBGL
     bindImplementation = &Framebuffer::bindImplementationDefault;
     bindInternalImplementation = &Framebuffer::bindImplementationDefault;
-    #endif
     checkStatusImplementation = &Framebuffer::checkStatusImplementationDefault;
 
-    #ifndef MAGNUM_TARGET_WEBGL
     if(context.isExtensionSupported<Extensions::GL::ANGLE::framebuffer_blit>()) {
         extensions.push_back(Extensions::GL::ANGLE::framebuffer_blit::string());
 
@@ -211,6 +209,8 @@ FramebufferState::FramebufferState(Context& context, std::vector<std::string>& e
         bindInternalImplementation = &Framebuffer::bindImplementationSingle;
         checkStatusImplementation = &Framebuffer::checkStatusImplementationSingle;
     }
+    #else
+    checkStatusImplementation = &Framebuffer::checkStatusImplementationSingle;
     #endif
 
     #ifndef MAGNUM_TARGET_WEBGL