Clean up unnecessary ternary expressions and simplify some returns

- Simplify conditions
- Use ZEND_HASH_APPLY_* instead of hard-coded booleans
- Use ZEND_NORMALIZE_BOOL
- Drop sign in favor of ZEND_NORMALIZE_BOOL

ext/bcmath/libbcmath/src/num2str.c

@@ -50,7 +50,7 @@ zend_string
 	int  index, signch;
 
 	/* Allocate the string memory. */
-	signch = ( num->n_sign == PLUS ? 0 : 1 );  /* Number of sign chars. */
+	signch = num->n_sign != PLUS;  /* Number of sign chars. */
 	if (scale > 0)
 		str = zend_string_alloc(num->n_len + scale + signch + 1, 0);
 	else