silence some warnings

geometry/Building.cpp

@@ -725,7 +725,6 @@ void Building::InitPlatforms()
 
             }//subroom
       }//rooms
-	  return true;
 }
       bool Building::InitInsideGoals()
       {

routing/ai_router/cognitiveMap/associations.cpp

@@ -10,7 +10,7 @@ AIAssociation::AIAssociation()
 
 }
 
-AIAssociation::AIAssociation(const AILandmark *landmark, const AILandmark *associated_landmark, bool connected)
+AIAssociation::AIAssociation(const AILandmark *landmark, const AILandmark *associated_landmark, bool /*connected*/)
 {
     _landmark=landmark;
     _associatedLandmark=associated_landmark;
@@ -58,4 +58,3 @@ bool AIAssociation::operator==(const AIAssociation &asso2) const
 {
     return this==&asso2;
 }
-

tinyxml/tinyxmlparser.cpp

@@ -111,17 +111,21 @@ void TiXmlBase::ConvertUTF32ToUTF8( unsigned long input, char* output, int* leng
 			--output;
 			*output = (char)((input | BYTE_MARK) & BYTE_MASK);
 			input >>= 6;
+			[[fallthrough]];
 		case 3:
 			--output;
 			*output = (char)((input | BYTE_MARK) & BYTE_MASK);
 			input >>= 6;
+			[[fallthrough]];
 		case 2:
 			--output;
 			*output = (char)((input | BYTE_MARK) & BYTE_MASK);
 			input >>= 6;
+			[[fallthrough]];
 		case 1:
 			--output;
 			*output = (char)(input | FIRST_BYTE_MARK[*length]);
+			[[fallthrough]];
 	}
 }
 
@@ -1635,4 +1639,3 @@ bool TiXmlText::Blank() const
 			return false;
 	return true;
 }
-