add windows dll, exe

Author: mattip

.gitignore

@@ -5,6 +5,8 @@
 *.pyc
 main
 *.so
+*.o
+*.obj
 .gdb_history
 build/
 c.raw

create_fractal.c

@@ -3,15 +3,16 @@
 int create_fractal(Img img,  int iters) {
     float pixel_size_x = 3.0 / img.width;
     float pixel_size_y = 2.0 / img.height;
-    int x, y;
+    int x, y, ret=0;
     for (y=0; y < img.height; y++) {
         float imag = y * pixel_size_y - 1;
         int yy = y * img.width;
         for (x=0; x < img.width; x++) {
             float real = x * pixel_size_x - 2;
             unsigned char color;
-            int ret = mandel(real, imag, iters, &color);
+            ret += mandel(real, imag, iters, &color);
             img.data[yy + x] = color;
         }
     }
+    return ret;
 }