LibGfx: Prefix class members with m_ in EdgeTable

No functional changes.

(cherry picked from commit 56ff36a0ee4160913c40aa8553d8a49256b7c1b7)

Userland/Libraries/LibGfx/EdgeFlagPathRasterizer.h

@@ -218,15 +218,15 @@ private:
 
         void set_scanline_range(int min_scanline, int max_scanline)
         {
-            this->min_scanline = min_scanline;
-            edges.resize(max_scanline - min_scanline + 1);
+            m_min_scanline = min_scanline;
+            m_edges.resize(max_scanline - min_scanline + 1);
         }
 
-        auto& operator[](int scanline) { return edges[scanline - min_scanline]; }
+        auto& operator[](int scanline) { return m_edges[scanline - m_min_scanline]; }
 
     private:
-        Vector<Detail::Edge*> edges;
-        int min_scanline { 0 };
+        Vector<Detail::Edge*> m_edges;
+        int m_min_scanline { 0 };
     } m_edge_table;
 };