modification to suppress compiler warning when LTC_FAST is not defined

src/mac/omac/omac_process.c

@@ -27,7 +27,7 @@
 */
 int omac_process(omac_state *omac, const unsigned char *in, unsigned long inlen)
 {
-   unsigned long n, x, blklen;
+   unsigned long n, x;
    int           err;
 
    LTC_ARGCHK(omac  != NULL);
@@ -42,20 +42,24 @@ int omac_process(omac_state *omac, const unsigned char *in, unsigned long inlen)
    }
 
 #ifdef LTC_FAST
-   blklen = cipher_descriptor[omac->cipher_idx].block_length;
-   if (omac->buflen == 0 && inlen > blklen) {
-      unsigned long y;
-      for (x = 0; x < (inlen - blklen); x += blklen) {
-          for (y = 0; y < blklen; y += sizeof(LTC_FAST_TYPE)) {
-              *((LTC_FAST_TYPE*)(&omac->prev[y])) ^= *((LTC_FAST_TYPE*)(&in[y]));
+   {
+       unsigned long blklen;
+       
+       blklen = cipher_descriptor[omac->cipher_idx].block_length;
+       if (omac->buflen == 0 && inlen > blklen) {
+          unsigned long y;
+          for (x = 0; x < (inlen - blklen); x += blklen) {
+              for (y = 0; y < blklen; y += sizeof(LTC_FAST_TYPE)) {
+                  *((LTC_FAST_TYPE*)(&omac->prev[y])) ^= *((LTC_FAST_TYPE*)(&in[y]));
+              }
+              in += blklen;
+              if ((err = cipher_descriptor[omac->cipher_idx].ecb_encrypt(omac->prev, omac->prev, &omac->key)) != CRYPT_OK) {
+                 return err;
+              }
           }
-          in += blklen;
-          if ((err = cipher_descriptor[omac->cipher_idx].ecb_encrypt(omac->prev, omac->prev, &omac->key)) != CRYPT_OK) {
-             return err;
-          }
-      }
-      inlen -= x;
-    }
+          inlen -= x;
+        }
+   }
 #endif
 
    while (inlen != 0) {