renamed opengl version to sdl

demo/demo.c

@@ -111,7 +111,7 @@ show_test_window(struct zr_window *window, struct zr_style *config, enum theme *
         zr_menu_begin(&layout, &menu, "MENU", 100, &file_state);
         {
             static size_t prog = 40;
-            static zr_size slider = 10;
+            static int slider = 10;
             static int check = zr_true;
             zr_layout_row_dynamic(&menu, 25, 1);
             zr_progress(&menu, &prog, 100, ZR_MODIFYABLE);

demo/sdl/Makefile

@@ -1,5 +1,5 @@
 # Install
-BIN = zahnrad
+BIN = demo
 
 # Compiler
 CC = clang
@@ -8,7 +8,7 @@ DCC = gcc
 # Flags
 CFLAGS = -std=c89 -pedantic
 
-SRC = ../../zahnrad.c opengl.c
+SRC = ../../zahnrad.c sdl.c
 OBJ = $(SRC:.c=.o)
 
 # Modes