OpenGLDevice: Fix pipeline cache leaving fields uninitialized

src/util/opengl_device.cpp

@@ -220,7 +220,6 @@ void OpenGLDevice::PushDebugGroup(const char* fmt, ...)
   va_start(ap, fmt);
   const std::string buf(StringUtil::StdStringFromFormatV(fmt, ap));
   va_end(ap);
-  if (!buf.empty())
   glPushDebugGroup(GL_DEBUG_SOURCE_APPLICATION, 0, static_cast<GLsizei>(buf.size()), buf.c_str());
 #endif
 }

src/util/opengl_pipeline.cpp

@@ -362,7 +362,7 @@ void OpenGLDevice::PostLinkProgram(const GPUPipeline::GraphicsConfig& plconfig,
         glUniform1i(location, i);
     }
 
-    glUseProgram(m_current_pipeline ? m_current_pipeline->GetProgram() : 0);
+    glUseProgram(m_last_program);
   }
 }
 
@@ -722,6 +722,8 @@ bool OpenGLDevice::ReadPipelineCache(const std::string& filename)
     }
 
     OpenGLPipeline::ProgramCacheItem pitem;
+    pitem.program_id = 0;
+    pitem.reference_count = 0;
     pitem.file_format = entry.format;
     pitem.file_offset = entry.offset;
     pitem.file_uncompressed_size = entry.uncompressed_size;