Clarified working of ImageDrawCircle and ImageDrawCircleV (#2719)

src/raylib.h

@@ -1285,8 +1285,8 @@ RLAPI void ImageDrawPixel(Image *dst, int posX, int posY, Color color);
 RLAPI void ImageDrawPixelV(Image *dst, Vector2 position, Color color);                                   // Draw pixel within an image (Vector version)
 RLAPI void ImageDrawLine(Image *dst, int startPosX, int startPosY, int endPosX, int endPosY, Color color); // Draw line within an image
 RLAPI void ImageDrawLineV(Image *dst, Vector2 start, Vector2 end, Color color);                          // Draw line within an image (Vector version)
-RLAPI void ImageDrawCircle(Image *dst, int centerX, int centerY, int radius, Color color);               // Draw circle within an image
-RLAPI void ImageDrawCircleV(Image *dst, Vector2 center, int radius, Color color);                        // Draw circle within an image (Vector version)
+RLAPI void ImageDrawCircle(Image *dst, int centerX, int centerY, int radius, Color color);               // Draw a filled circle within an image
+RLAPI void ImageDrawCircleV(Image *dst, Vector2 center, int radius, Color color);                        // Draw a filled circle within an image (Vector version)
 RLAPI void ImageDrawCircleLines(Image *dst, int centerX, int centerY, int radius, Color color);          // Draw circle outline within an image
 RLAPI void ImageDrawCircleLinesV(Image *dst, Vector2 center, int radius, Color color);                   // Draw circle outline within an image (Vector version)
 RLAPI void ImageDrawRectangle(Image *dst, int posX, int posY, int width, int height, Color color);       // Draw rectangle within an image