hotfix: ref_primes has wrong value for 5 prbs

the bigger prime number lower than 60 is 59, not 50

openair1/PHY/LTE_REFSIG/lte_ul_ref.c

@@ -35,7 +35,7 @@
 
 uint16_t dftsizes[33] = {12,24,36,48,60,72,96,108,120,144,180,192,216,240,288,300,324,360,384,432,480,540,576,600,648,720,864,900,960,972,1080,1152,1200};
 
-uint16_t ref_primes[33] = {11,23,31,47,50,71,89,107,113,139,179,191,211,239,283,293,317,359,383,431,479,523,571,599,647,719,863,887,953,971,1069,1151,1193};
+uint16_t ref_primes[33] = {11,23,31,47,59,71,89,107,113,139,179,191,211,239,283,293,317,359,383,431,479,523,571,599,647,719,863,887,953,971,1069,1151,1193};
 
 
 int16_t *ul_ref_sigs[30][2][33];