removed argp related warnings

src/mandelbrot.c

@@ -210,20 +210,20 @@ struct arguments
 
 static struct argp_option options[] =
 {
-    {"output file", 'o', "FILE", 0, "Render to image, default False"},
-    {"width", 'w', "WIDTH", 0, "Width of window/image, default 640"},
-    {"height", 'h', "HEIGHT", 0, "Height of window/image, default 480"},
-    {"iterations", 'i', "ITERATIONS", 0, "Max iterations, default 250."},
-    {"dont_use_avx", 'x', 0, 0, "NOT use avx for calculations, default False"},
-    {"dont_use_omp", 't', 0, 0, "NOT use openmpfor calculations, default False"},
-    {"recalc", 'r', 0, 0, "Recalculate set on every frame, default False"},
-
-    {"x_min", 'a', "VALUE", 0, "X min"},
-    {"x_max", 'b', "VALUE", 0, "X max"},
-    {"y_min", 'c', "VALUE", 0, "Y min"},
-    {"y_max", 'd', "VALUE", 0, "Y max"},
-
-    {"zoom", 'z', "VALUE", 0, "Zoom"},
+    {"output file", 'o', "FILE", 0, "Render to image, default False", 0},
+    {"width", 'w', "WIDTH", 0, "Width of window/image, default 640", 0},
+    {"height", 'h', "HEIGHT", 0, "Height of window/image, default 480", 0},
+    {"iterations", 'i', "ITERATIONS", 0, "Max iterations, default 250.", 0},
+    {"dont_use_avx", 'x', 0, 0, "NOT use avx for calculations, default False", 0},
+    {"dont_use_omp", 't', 0, 0, "NOT use openmpfor calculations, default False", 0},
+    {"recalc", 'r', 0, 0, "Recalculate set on every frame, default False", 0},
+
+    {"x_min", 'a', "VALUE", 0, "X min", 0},
+    {"x_max", 'b', "VALUE", 0, "X max", 0},
+    {"y_min", 'c', "VALUE", 0, "Y min", 0},
+    {"y_max", 'd', "VALUE", 0, "Y max", 0},
+
+    {"zoom", 'z', "VALUE", 0, "Zoom", 0},
   {0}
 };
 
@@ -282,7 +282,7 @@ parse_opt (int key, char *arg, struct argp_state *state)
   return 0;
 }
 
-static struct argp argp = {options, parse_opt, NULL, NULL};
+static struct argp argp = {options, parse_opt, NULL, NULL, NULL, NULL, NULL};
 
 void 
 render_cl(Array *arr, SDL_Texture *texture, SDL_Renderer *renderer, int width, int height, ViewInfo *view,