Disable texture compression on Intel Mesa too

src/graphics/irr_driver.cpp

@@ -496,16 +496,17 @@ void IrrDriver::initDevice()
         m_need_srgb_workaround = false;
         m_support_sdsm = true;
         m_support_texture_compression = true;
-#ifdef WIN32
         if (strstr((const char *)glGetString(GL_VENDOR), "Intel") != NULL)
         {
             // Intel on windows doesnt support srgb compressed textures properly
             m_support_texture_compression = false;
+#ifdef WIN32
             // Fix for Intel Sandy Bridge on Windows which supports GL up to 3.1 only
             if (m_gl_major_version == 3 && m_gl_minor_version == 1)
                 m_need_ubo_workaround = true;
-        }
 #endif
+        }
+
         // Fix for Nvidia and instanced RH
         if (strstr((const char *)glGetString(GL_VENDOR), "NVIDIA") != NULL)
         {