Remove uncaught usage of ptr16

Author: daviesrob

htscodecs/rANS_static32x16pr.c

@@ -489,8 +489,8 @@ unsigned char *rans_compress_O1_32x16(unsigned char *in,
 #ifdef HTSCODECS_LITTLE_ENDIAN
                 memcpy(&ptr[-2], &ransN[z-k], 2);
 #else
-                ptr16[-2] = ransN[z-k];
-                ptr16[-1] = ransN[z-k]>>8;
+                ptr[-2] = ransN[z-k];
+                ptr[-1] = ransN[z-k]>>8;
 #endif
                 ptr -= c * 2;
                 //ransN[z-k] >>= c<<4;