Small refactorings

Modifications:
* eliminate unnecessary variables, functions
* use ECMA_NUMBER macros where it is possible
* simplify code
* minor style fix (comments, increase-decrease operators)

JerryScript-DCO-1.0-Signed-off-by: Zsolt Borbély zsborbely.u-szeged@partner.samsung.com

jerry-core/parser/js/js-lexer.c

@@ -792,7 +792,7 @@ lexer_parse_number (parser_context_t *context_p) /**< context */
 
       do
       {
-        source_p ++;
+        source_p++;
       }
       while (source_p < source_end_p
              && lexer_is_hex_digit (source_p[0]));
@@ -809,7 +809,7 @@ lexer_parse_number (parser_context_t *context_p) /**< context */
 
       do
       {
-        source_p ++;
+        source_p++;
       }
       while (source_p < source_end_p
              && source_p[0] >= '0'

jerry-core/parser/js/js-parser.c

@@ -1430,7 +1430,7 @@ parser_post_processing (parser_context_t *context_p) /**< context */
          * instructions, since this form is constructed during post
          * processing and cannot be emitted directly. */
         *opcode_p = CBC_JUMP_FORWARD;
-        length --;
+        length--;
       }
       else
       {