progs/demos: Fix memory leak in projtex.c.
(cherry picked from commit ee555e3d69c8820f27e71e5ebc028a768cef7d0b)
diff --git a/progs/demos/projtex.c b/progs/demos/projtex.c
index 99154d7..ad205c7 100644
--- a/progs/demos/projtex.c
+++ b/progs/demos/projtex.c
@@ -245,6 +245,9 @@
        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
      }
      glTexParameterfv(GL_TEXTURE_2D, GL_TEXTURE_BORDER_COLOR, borderColor);
+
+     free(texData3);
+     free(texData4);
   }
 }