fixed C++ syntax in C code

fixed end of string detection in string->decimal conversion to avoid false alarm about some string part left unconverted (string can be not null terminated)
ignore my_decimal.cc in libmysqld directory

.bzrignore

@@ -1059,3 +1059,4 @@ support-files/ndb-config-2-node.ini
 client/decimal.c
 client/my_decimal.cc
 client/my_decimal.h
+libmysqld/my_decimal.cc

sql/my_decimal.cc

@@ -171,7 +171,7 @@ int str2my_decimal(uint mask, const char *from, uint length,
   }
   my_decimal_set_zero(decimal_value);
   err= string2decimal((char *)from, (decimal *)decimal_value, &end);
-  if (*end && !err)
+  if ((end-from) != length && !err)
     err= E_DEC_TRUNCATED;
   check_result(mask, err);
   return err;

strings/decimal.c

@@ -686,12 +686,13 @@ int decimal_shift(decimal *dec, int shift)
   {
     /* need to move digits */
     int d_shift;
+    dec1 *to, *barier;
     if (new_front > 0)
     {
       /* move left */
       d_shift= new_front / DIG_PER_DEC1;
-      dec1 *to= dec->buf + (ROUND_UP(beg + 1) - 1 - d_shift);
-      dec1 *barier= dec->buf + (ROUND_UP(end) - 1 - d_shift);
+      to= dec->buf + (ROUND_UP(beg + 1) - 1 - d_shift);
+      barier= dec->buf + (ROUND_UP(end) - 1 - d_shift);
       DBUG_ASSERT(to >= dec->buf);
       DBUG_ASSERT(barier + d_shift < dec->buf + dec->len);
       for(; to <= barier; to++)
@@ -704,8 +705,8 @@ int decimal_shift(decimal *dec, int shift)
     {
       /* move right */
       d_shift= (1 - new_front) / DIG_PER_DEC1;
-      dec1 *to= dec->buf + ROUND_UP(end) - 1 + d_shift;
-      dec1 *barier= dec->buf + ROUND_UP(beg + 1) - 1 + d_shift;
+      to= dec->buf + ROUND_UP(end) - 1 + d_shift;
+      barier= dec->buf + ROUND_UP(beg + 1) - 1 + d_shift;
       DBUG_ASSERT(to < dec->buf + dec->len);
       DBUG_ASSERT(barier - d_shift >= dec->buf);
       for(; to >= barier; to--)