BASIC : SbiRuntime::ClearExprStack should return void

Change-Id: I704d8920ec44b6d2eb1fc9599dc37e41a28b5e63
Reviewed-on: https://gerrit.libreoffice.org/17779Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Arnaud Versini <arnaud.versini@libreoffice.org>

basic/source/inc/runtime.hxx

@@ -303,7 +303,7 @@ class SbiRuntime
     SbxVariableRef PopVar();
     SbxVariable* GetTOS( short=0 );
     void TOSMakeTemp();
-    bool ClearExprStack();
+    void ClearExprStack();
 
     void PushGosub( const sal_uInt8* );
     void PopGosub();

basic/source/runtime/runtime.cxx

@@ -1002,7 +1002,7 @@ SbxVariableRef SbiRuntime::PopVar()
     return xVar;
 }
 
-bool SbiRuntime::ClearExprStack()
+void SbiRuntime::ClearExprStack()
 {
     // Attention: Clear() doesn't suffice as methods must be deleted
     while ( nExprLvl )
@@ -1010,7 +1010,6 @@ bool SbiRuntime::ClearExprStack()
         PopVar();
     }
     refExprStk->Clear();
-    return false;
 }
 
 // Take variable from the expression-stack without removing it