Fix infinite loop in indexMirror. Fixes issue 65.

ChangeLog

@@ -1,6 +1,7 @@
 NVIDIA Texture Tools version 2.0.4
  * Fix error in RGB format output; reported by jonsoh. See issue 49.
  * Added support RGB format dithering by jonsoh. Fixes issue 50 and 51.
+ * Prevent infinite loop in indexMirror when width equal 1. Fixes issue 65.
 
 NVIDIA Texture Tools version 2.0.3
  * More accurate DXT3 compressor. Fixes issue 38.

src/nvimage/FloatImage.h

@@ -226,11 +226,15 @@ inline uint FloatImage::indexRepeat(int x, int y) const
 
 inline uint FloatImage::indexMirror(int x, int y) const
 {
+	if (m_width == 1) x = 0;
+
 	x = abs(x);
 	while (x >= m_width) {
 		x = abs(m_width + m_width - x - 2);
 	}
 
+	if (m_height == 1) y = 0;
+	
 	y = abs(y);
 	while (y >= m_height) {
 		y = abs(m_height + m_height - y - 2);