Update comments

engine/compiler.c

@@ -2651,7 +2651,7 @@ static sxi32 PH7_CompileReturn(ph7_gen_state *pGen) {
 static sxi32 PH7_CompileHalt(ph7_gen_state *pGen) {
 	sxi32 nExpr = 0;
 	sxi32 rc;
-	/* Jump the die/exit keyword */
+	/* Jump the exit keyword */
 	pGen->pIn++;
 	if(pGen->pIn < pGen->pEnd && (pGen->pIn->nType & PH7_TK_SEMI) == 0) {
 		/* Compile the expression */

engine/parser.c

@@ -320,7 +320,7 @@ PH7_PRIVATE void PH7_DelimitNestedTokens(SyToken *pIn, SyToken *pEnd, sxu32 nTok
 	*ppEnd = pCur;
 }
 /*
- * Retrun TRUE if the given ID represent a language construct [i.e: print,echo..]. FALSE otherwise.
+ * Return TRUE if the given ID represent a language construct [i.e: print,echo..]. FALSE otherwise.
  * Note on reserved keywords.
  *  According to the PHP language reference manual:
  *   These words have special meaning in PHP. Some of them represent things which look like