Revert "we really should be using round, but why is it worse?"

This reverts commit 81f6de2a8f.

src/common/mod.rs

@@ -2363,7 +2363,7 @@ impl GridSampler for DefaultGridSampler {
             let mut x = 0;
             while x < max {
                 //   for (int x = 0; x < max; x += 2) {
-                if image.get(points[x].round() as u32, points[x + 1].round() as u32) {
+                if image.get(points[x].floor() as u32, points[x + 1].floor() as u32) {
                     // Black(-ish) pixel
                     bits.set(x as u32 / 2, y);
                 }

src/qrcode/detector/alignment_pattern_finder.rs

@@ -290,7 +290,7 @@ impl AlignmentPatternFinder {
         let centerJ = Self::centerFromEnd(stateCount, j);
         let centerI = self.crossCheckVertical(
             i,
-            centerJ.round() as u32,
+            centerJ.floor() as u32,
             2 * stateCount[1],
             stateCountTotal,
         );

src/qrcode/detector/finder_pattern.rs

@@ -92,7 +92,7 @@ impl FinderPattern {
             combinedX,
             combinedY,
             combinedModuleSize,
-            combinedCount.round() as usize,
+            combinedCount.floor() as usize,
         )
     }
 }

src/qrcode/detector/finder_pattern_finder.rs

@@ -620,7 +620,7 @@ impl FinderPatternFinder {
                     return (((fnp.getX() - center.getX().abs())
                         - (fnp.getY() - center.getY()).abs())
                         / 2.0)
-                        .round() as u32;
+                        .floor() as u32;
                 }
             }
         }