[Fix] Slight plasma fractal issue.

src/plasmaf.c

@@ -45,6 +45,10 @@ static double* pf_genFractalMap(const int w, const int h, double rug) {
   double cx, cy;
 
   map = malloc(w*h * sizeof(double));
+  if(map == NULL) {
+    WARN("Out of memory");
+    return NULL;
+  }
 
   // Set up initial values.
   cx = (double)w/2;
@@ -93,7 +97,6 @@ static void pf_divFractal(double* map, const double x, const double y,
     pf_divFractal(map, x,    y+nh,  nw, nh, rw, rh, e4, m,  e3, c4, rug);
   } else
     // Actually write the pixel.
-    //map[y*rw+x] = (c1 + c2 + c3 + c4)/4.;
-    map[(int)round(y)*(int)rw+(int)round(x)] = (c1 + c2 + c3 + c4)/4.;
+    map[(int)y*(int)rw + (int)x] = (c1 + c2 + c3 + c4)/4.;
 }