DDSLoader: fix loading 16-bit images (as exported by PVRTexTool)

jme3-core/src/plugins/java/com/jme3/texture/plugins/DDSLoader.java

@@ -327,10 +327,18 @@ public class DDSLoader implements AssetLoader {
 
             if (is(pfFlags, DDPF_RGB)) {
                 if (is(pfFlags, DDPF_ALPHAPIXELS)) {
+                    if (bpp == 16) {
+                        pixelFormat = Format.RGB5A1;
+                    } else {
                         pixelFormat = Format.RGBA8;
+                    }
+                } else {
+                    if (bpp == 16) {
+                        pixelFormat = Format.RGB565;
                     } else {
                         pixelFormat = Format.RGB8;
                     }
+                }
             } else if (is(pfFlags, DDPF_GRAYSCALE) && is(pfFlags, DDPF_ALPHAPIXELS)) {
                 switch (bpp) {
                     case 16: