added fill to rect, and returns when ARC_Config_Get has a null temp value

include/arc/graphics/rectangle.h

@@ -12,6 +12,8 @@ extern "C" {
 
 void ARC_Rect_Render(ARC_Rect *rect, ARC_Renderer *renderer, ARC_Color *color);
 
+void ARC_Rect_RenderFill(ARC_Rect *rect, ARC_Renderer *renderer, ARC_Color *color);
+
 #ifdef __cplusplus
 }
 #endif

src/graphics/sdl/rectangle.c

@@ -8,4 +8,9 @@ void ARC_Rect_Render(ARC_Rect *rect, ARC_Renderer *renderer, ARC_Color *color){
     SDL_RenderDrawRect(renderer->renderer, (SDL_Rect *) rect);
 }
 
+void ARC_Rect_RenderFill(ARC_Rect *rect, ARC_Renderer *renderer, ARC_Color *color){
+    SDL_SetRenderDrawColor(renderer->renderer, color->r, color->g, color->b, color->a);
+    SDL_RenderFillRect(renderer->renderer, (SDL_Rect *) rect);
+}
+
 #endif // ARC_SDL

src/std/config.c

@@ -156,6 +156,12 @@ void ARC_Config_Get(ARC_Config *config, ARC_String *keyname, void **value){
         if(group){
             ARC_String_Destroy(group);
         }
+
+        if(temp == NULL){
+            *value = NULL;
+            return;
+        }
+
         *value = temp->data;
         return;
     }