Revert "render: Allow clear_screen render commands to be for a single frame."

This reverts commit ec24777.

Author: icculus

data/games/maddog/game.lua

@@ -578,7 +578,7 @@ local function check_actions(inputs)
                 gunsound = "empty"
             else
                 -- flash the screen white for one frame when firing to give some weight to it. I learned this trick from The Fablemans, lol.
-                DirkSimple.clear_screen(255, 255, 255, true)
+                DirkSimple.clear_screen(255, 255, 255)
                 gunsound = "shot"
                 if not infinite_bullets then
                     scene_manager.loaded_bullets = scene_manager.loaded_bullets - 1

dirksimple.c

@@ -59,7 +59,6 @@ typedef struct RenderCommand
         struct
         {
             uint8_t r, g, b;
-            int one_frame_flash;
         } clear;
         struct
         {
@@ -1003,7 +1002,6 @@ static int luahook_DirkSimple_clear_screen(lua_State *L)
     cmd->data.clear.r = (uint8_t) lua_tonumber(L, 1);
     cmd->data.clear.g = (uint8_t) lua_tonumber(L, 2);
     cmd->data.clear.b = (uint8_t) lua_tonumber(L, 3);
-    cmd->data.clear.one_frame_flash = lua_toboolean(L, 4) ? 1 : 0;
     return 0;
 }
 
@@ -1709,15 +1707,10 @@ static void send_rendering_primitives(void)
 {
     DirkSimple_beginframe();
     for (int i = 0; i < GNumRenderCommands; i++) {
-        RenderCommand *cmd = &GRenderCommands[i];
+        const RenderCommand *cmd = &GRenderCommands[i];
         switch (cmd->prim) {
             case RENDPRIM_CLEAR:
-                if (cmd->data.clear.one_frame_flash >= 0) {
-                    DirkSimple_clearscreen(cmd->data.clear.r, cmd->data.clear.g, cmd->data.clear.b);
-                    if (cmd->data.clear.one_frame_flash == 1) {
-                        cmd->data.clear.one_frame_flash = -1;
-                    }
-                }
+                DirkSimple_clearscreen(cmd->data.clear.r, cmd->data.clear.g, cmd->data.clear.b);
                 break;
             case RENDPRIM_RECT:
                 DirkSimple_drawrect(cmd->data.rect.x, cmd->data.rect.y, cmd->data.rect.w, cmd->data.rect.h,