Fix scrutinizer warnings

ChangeLog

@@ -39,7 +39,7 @@ Dolibarr better:
 - Trigger name SUPPLIER_PROPOSAL_CREATE has been renamed into PROPOSAL_SUPPLIER_CREATE.
 - A new paramater sqlfilters was introduced to allow filter on any fields int the REST API. Few old parameters,
   no more required, were also removed. Use this new one if you were using one of them.
-
+- The trigger that activate or close a contract line is run on a contract line, not on contract.
 
 
 ***** ChangeLog for 4.0.2 compared to 4.0.1 *****

htdocs/accountancy/class/bookkeeping.class.php

@@ -73,7 +73,7 @@ class BookKeeping extends CommonObject
 	public $id;
 	/**
 	 */
-	public $doc_date = '';
+	public $doc_date;
 	public $doc_type;
 	public $doc_ref;
 	public $fk_doc;
@@ -1163,9 +1163,12 @@ class BookKeeping extends CommonObject
 	 * @return void
 	 */
 	public function initAsSpecimen() {
-		$this->id = 0;
+		global $user;
 		
-		$this->doc_date = '';
+		$now=dol_now();
+		
+		$this->id = 0;
+		$this->doc_date = $now;
 		$this->doc_type = '';
 		$this->doc_ref = '';
 		$this->fk_doc = '';
@@ -1173,11 +1176,11 @@ class BookKeeping extends CommonObject
 		$this->code_tiers = '';
 		$this->numero_compte = '';
 		$this->label_compte = '';
-		$this->debit = '';
+		$this->debit = 99.9;
 		$this->credit = '';
 		$this->montant = '';
 		$this->sens = '';
-		$this->fk_user_author = '';
+		$this->fk_user_author = $user->id;
 		$this->import_key = '';
 		$this->code_journal = '';
 		$this->piece_num = '';

htdocs/projet/class/api_projects.class.php

@@ -441,7 +441,6 @@ class Projects extends DolibarrApi
         {
             throw new RestException(500, $this->project->error);
         }
-        return false;
     }
 
     /**

htdocs/projet/class/api_tasks.class.php

@@ -445,8 +445,6 @@ class Tasks extends DolibarrApi
         {
             throw new RestException(500, $this->task->error);
         }
-
-        return false;
     }
 
     /**